Paperhood: Vast selection of heat transfer vinyl, run by extremely helpful, knowledgeable, yet somewhat kooky proprietor.
https://www.makerkraft.com/: acrylic delivered to the lab. FCFL discount.
Compleat Sculptor: Large selection of machining plastics, foams and casting materials.
Closest Hardware Stores:
- Ace Hardward on W 3rd
- Garbers on Greenwich St.