Why not just look up on a site called James's planted tank, you will find all the information on how to make a single solution of micros and macros with practically the exact same values, thats what i do and it saves you a fortune.
I think you may be out of luck. I was lucky enough to catch the eye of an employee of Tropica in Denmark with some of my plants. We arranged a swap where in exchange fror my plants he sent me 500ml tpn+, tpn+ root tabs and some plants.
Maybe try sending tropica an e-mail to see what could be done.