Hey Charles!
I've relined elevator and train brakes... doing a CC is no big deal. Since the disks are plain steel (not cast iron), and they're not in a high-heat scenario, you can use just about any material and adhesive you can make work. It's not unusual to see low-speed steel brakes running LEATHER linings... I've seen quite a few other things used (OEM) that're quite amusing... but there's procedures for relining brakes on all sorts of equipment... from elevators to crane hoisting drums to heavy equipment brakes.
My railroad brakes are held on with rivets, adhesives, or combination of both... of course, heat IS an issue in these machines, and the soft disks present a very high coefficient of friction, so fastening is much more critical than a cub.
My suggestion: use a semi-metallic material. Measure the width of the fully-open caliper, and fill the gap about 90%. Use a good strong adhesive... you can experiment a bit (if it's no good, the lining will just come loose). I've had good luck using a product called Gorilla Glue on some brakes I've made for other odd (hoisting) machines... it's a Cyano-Acrilate (CA) glue strikingly similar to Great Stuff expanding foam, but it doesn't expand.
Wire brush the pad backing 'till it's shiny-clean, and hit it with a sanding block. Rough up the backside of the lining material a bit (sandpaper or a brush), then spread glue and stick it down. No need to trim it nicely beforehand- it's actually easier to cut most linings to profile after they've been glued on.
Tedd- I wouldn't worry too much about the aftermarket loss of brake pads... the sales volume is so low that replacements are just farmed out to the same places that make every other sort of replacement brake shoes/pads. In the case of CC's, relining'em yourself is a low-cost, high-economy solution with essentially no impact on the aftermarket.