I'm building up an old GT Ti with an Edge fork. The fork where the brake pivot bolt goes through is about 45mm thick. My 105 (BR-1055) caliper has a bolt/nut designed for about 28mm which leaves me 17mm short. I found longer recessed nuts (loosescrews.com) but the longest is only 12mm longer. I've also checked Sheldon and BikeToolsEtc. Any ideas?