I used to work with scaffolding technologies for TE and we once bought PHB,D-PLA L-PLA, PLA/PLA copolymer and PCL, 100g each.
I remember it cost us 2500$USD for everything, so expect 100g of medical PLA to cost 500$ for 100gms.
We bought it from lakeshore biomaterials which is US-based but they shipped worldwide. Even to NZ :-)
Hi, I bought pla, phb.polyglyc and pcl from lakeshore and they only had granules at the time i bought it. It came in a cooled box and delivery was quite fast. If you need to know more about medical grade polymers just ask.