KR> KR foam?

[Bill Masquelier]

I have run out of the foam that came with my partially completed KR2 and need 
to get some more
Can anyone tell me what the specific foam type is and a good source?
The manual says that it is "urethane foam" but I don't believe that it is 
correct, I am looking for the "flourist" type foam (geen stuff)
Thanks
Bill Masquelier