The pictures below illustrate one option for folks who like to work on their own old sports cars and enjoy good parts availability. It’s a Toyota caliper mounted on a TR3. We got the rebuilt caliper from Napa. It’s either nifty or sacrilegious… your call.

This is a Toyota caliper on a Girling rotor. The caliper hose has a metric fitting on the caliper side and a standard fitting on the opposite side.