UGDude,Nevada, Thanks - I'm going to try and get the 60-P stand done soon. I have to putty / sand / prime / paint it still. But the main structure is all screwed together now.
Thomas, here are the measurements and directions on building the DIY stand that I made. Please bear in mind I have very little handyman skills so you will want to measure three times before you cut. I tried to simulate the look of the ADA stand without spending a lot of money. I bought the MDF 3/4" at Home Depot, they sell it precut into 36" lengths for shelving. The larger pieces like the door are bonded together to make the larger size. The rest are simple cuts off the stock size using a regular saw or a if you have it a table saw or circular saw. I did buy a small palm sander since you will be sanding a good amount. All the boards are screwed together using wood screws. I bought a countersink attachment for my cordless drill so the screw heads are below the surface of the MDF.
Items you will need and rough prices
8 or 9 of the precut MDF 3/4" shelving boards from Home Depot, they are around $3.60 each.
a box of 1 1/4" screws (1 lb of screws should be enough to build many many stands) $3
countersink bit $7 (optional)
bondo or wood putty $5
grey wood primer $7
black matte spray paint (two cans) $10
aquamat (from ADGShop or AquaForest)
Tools used
Cordless drill
Saw
palm sander
Tape Measure
Clamps
Wood Glue
MDF Cuts
23 3/4" long x 12" deep (top / bottom) (two pieces - one top and bottom of stand)
11 5/16" deep x 36" height (sides) (two pieces - sides of stand)
22 2/16" long x 13" height (two pieces - back braces for stand - top and bottom, top sits directly under the top board and inside the side boards)
23 3/4" long x 9 6/16" height (one piece - front sits directly under top in front of the side boards)
23 3/4" long x 26 12/16" height (door - two pieces bonded with glue + backing scrap MDF and screws)
assemble the pieces for a dry fit - you can use tape to hold it together on the floor to mark where you will want to drill your pilot holes (see picture I posted earlier). I used about 3 screws per attachment point and I used the countersink bit so the screws would not stick out at all. After you screw together the structure you will sand it so that all the bits are flush - you will want to do this outside since MDF generates a lot of dust. Fill in the screw holes and imperfections with bondo or wood putty. Once the putty has dried sand again.
Once the stand has been rough finished you can apply the primer. I just bought a grey wood primer and used a brush to apply. I did two coats and sanded between coats. After which you can apply the spray paint. I waited a day between coats, I did two I believe on the smaller cube stand.
If you want you can buy european hinges for the door or just have it a snug fit using a smaller MDF strip in the back of the front door that is roughly the width of the opening (22 2/16") the door will fit in nice and flush and whenever you need access to the interior just pull the front door off. This is what I did.
Once last item - you will need to trim the Aquamat slightly since it is a little too long and wide for this stand bit it fits the 60-P perfectly. Label all your pieces with a marker so its easy to put together.
Hope that helps

Not a fancy stand but it looks ok and won't break the bank.
One other thing, I added an additional MDF 3/4" board on the bottom of the stand, to give the stand a larger base for stability. You may not need to do this but simply cut to size and attach it to the bottom of the stand with the same screws. See earlier pics of my cube stand for how this looks on the smaller stand.