The bridge in the pic that I posted was made by me out of a TOM with it's base machined flat and height reduced. The bridge is then drilled to accept the legs from a Jazzmaster/Mustang/Jaguar bridge. I first did this to fix some problems on a Jazzmaster which has a notoriously cr@p bridge but have subsequently used the same idea on guitars where the trem is mounted separately to the bridge. The bridge swings back and forth as you operate the trem negating the need for the string to slide over the saddles. Will was right; some old Gibsons with Bigsby trems had curved tops to the saddles to help the strings to slide.