fabric store out of business
So not necessarily free, but just really really cheap.
A fabric store near me in Ridgewood, Queens is going out of business. They'll be closed for good in about a week or two so right now
all their fabrics and fixings are on sale. I recently purchased an industrial sized spool of elastic for just a couple of dollars and fabric goes from 99 cents a yard to $2.99. It's a small place so they have a random selection of stuff.
A & S Quality Fabrics Corp
5607 Myrtle Ave, Flushing, NY
(718) 497-9746
Take the M or the L to Myrtle-Wyckoff and walk up Myrtle Ave to the corner of Cypress and it'll be there on your left side.