I have some nice Cambarellus Puer for sale.....$10 each and shipping will run $8 priority and $25 Express. These are great dwarf crays and stay very small. Max of 2" but I dont see many over 1.5"
From my experience they do no eat plants, fish or shrimp. They will eat sick or dead fish and shrimp. When stocking these try to have some places for them to hide because when they molt they are easily damaged by the other crays. Here is a picture of what they look like
and here is the thread and seller that I bought them from
http://www.aquaticplantcentral.com/forumapc/sale-trade/40007-fs-cambarellus-puer.html
From my experience they do no eat plants, fish or shrimp. They will eat sick or dead fish and shrimp. When stocking these try to have some places for them to hide because when they molt they are easily damaged by the other crays. Here is a picture of what they look like

and here is the thread and seller that I bought them from
http://www.aquaticplantcentral.com/forumapc/sale-trade/40007-fs-cambarellus-puer.html