Gotten around to dealing with the brakes on my '76 F and they are both going to have to be rebuilt. The front is a pretty common item and there are lots of alternatives for kits and pieces. The back, however, is turning out to be a problem. I've located exactly one rebuild kit for over $100, and in general it seems like this component is on the verge of being orphaned by the aftermarket, so I'm wondering if there's anything like a bolt on substitute, like, say the rear brake from the F2-F3, or possibly the Goldwing of the same era?