Since the calipers have yet to actually fail, it's probably more economical to rebuild them: Piston seals and boots can be had for a very low cost, and while they're torn down, it would be a good opportunity for high temp paint to protect them, then going forwards, this seems like the exact thing that would be needed.
http://www.ft86speedfactory.com/velo...l#.XWPOinVKiUk