Thanks, I'd placed the order before seeing your reply. Where do you find the discount codes?
Fascinating! I'd never heard this before, but it makes sense. However, the dealer price was very high - C$164 + taxes. I've ordered Raybestos shoes from Rock Auto - < C$50 delivered, and accept that the parking brake may not be as effective as it would have been with factory shoes.
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Thanks, everyone, for your input - I've ordered Akebono pads, Mando calipers, and Raybestos coated rotors, and picked up some Permatex Ceramic Extreme brake lube, rated -50 F to 3000 F.