picatinny rail blanks

[Josh Aston]

I'm looking for some picatinny rail blanks (or base stock) in polymer, high impact plastic, whatever you'd like to call it. It's easy enough to find them in aluminum and steel, but I haven't been able to locate any plastic ones. Anyone have any leads?

[Omnivore]

Try Ergo Grip. They sell a polymer 1913 rail, but its not exactly a blank. It has mounting holes pre drilled:
http://www.ergogrips.net/item-detail.cfm?ID=4356&storeid=1&image=ergoprail.gif&CFID=1109301&CFTOKEN=38363880