I'm looking to buy on the order of 5-50lbs of PET pellets or other shaped stock suitable for testing some prototype melt-processing equipment I'm working on, but I've been unable to source any at my usual places (Ebay and amazon, plus misc. googling). I'd also like to avoid industrial suppliers (industrial quantities!) at this stage if possible.
Any advice as to where to look?
Find one of those Industrial Supplier and tell him what you're doing and ask for samples. I'm willing to bet he has a broken bag or two he would be willing to sample.