I'm wondering if there are any interchangeable front brake calipers for my 1973 CB450K6? A previous owner had stripped the bleeder valve threads on the caliper housing and rounded off the nuts on the steel pipe part of the brake line. I'm in need of a new caliper and the hose from the junction box down. Are there any direct replacements besides a caliper from a CB450K6? I've been searching ebay with no luck and can't afford the $275 for a brand new caliper from Bike Bandit. Any help would be greatly appreciated. Thanks!