Kool Stop has thinline brake pads. Just this past week I mounted them on my Lemond Poprad, Avid shorty 4 cantilever. I had already installed a fork mounted cable guide to stop the fork shudder. The new KS salmon thinline pads stopped the squealing. Better braking also. I purchased them from
www.Jensonusa.com., $10.95 per pair so 21.90. That was the best price I found, and I recommend them. Get the order to $50 and get free shipping.
They also come with numerous washers/spacers just for the purpose of distance set up.