You might try Filson's in Seattle. I believe they make the iron cloth they use in their coats.
Filson ClickyBill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.