The source for biothane (also called oputhane) tack in my area (northwest
and midwest) that I recommend is Teddy Lancaster's Running Bear Farm. She
makes all the stuff herself and has unlimited colors (almost). If you have
a hard to fit horse or saddle she can even do custom. Almost all of my
distance equipment is hers and I've never had a bit of trouble. Its also
easiy to get replacement parts. Her toll-free number is 1 800 533 BEAR,
her inquiry line is 1 614 533 0154.
Im sure she will send you a catalog if you request...
Shannon Loomis and Quail Meadow Star