F-7 Industrial Felt by The Foot - 72" Wide x 3 ft Long x 1" Thick: Amazon.com: Industrial & Scientific
Feltique: Techniques and Projects for Wet Felting, Needle Felting, Fulling, and Working with Commercial Felt - Davidson, Nikola; Morris, Brookelynn: 9780307406996 - AbeBooks
Industrial Felt - Ramsay Rubber
Industrial Wool Felt. Widest range available. All Grades.
SAE Felt: What is it and how is it made? - BIT Felt