|: So, I have this pair of rollerblades (boot in pic) with detachable frames. Works like a ski boot binding, latches at heel and toe. But I want rollerskates!
There is a skate like that even now used by aggressive skaters. They are called "Xsjados".
You get a 'wrap'(shoe), and the basic frame with buckling straps. Something like that would work with quads as well.
I'd use light weight plastic quad skate plates. Seems like it might be best to rivet them onto your plastic clamp ons.