Ive got loads of 730s Ive stripped from old bikes.
as well as other sizes such as 810, 890, 1000, 500, 605s.
I have 500s on my Raleigh Flyer. Its a 80s racer, has the smoother looking calipers. But the weimman pads are terrible. I ride with the brakes adjusted up. But not much happens...