I play a blond Kay bass made in 1945. The previous owner used it for playing in a country band and setup was neglected for decades. So when I bought it the bridge was tipped over at a crazy angle and it must have been played that way for years. So short story is that the feet of the bridge indented the top to a considerable extent so that fitting a new bridge in the usual way would be very difficult (to say the least). The wood is not broken, just very indented and it does not provide a good reference surface to sand to. How can this be repaired?