Oh sure. I actually started out doing those because at the time I was a big Cold Steel fan. Most of those old models have changed or been renamed or outright discontinued I think but most of the ones like the Vaquero, Voyagers or GunSite knives are no different to me than rebuilding any Spyderco.
Also, a lot of the Cold Steel knives I redid were all done before I even owned a computer so I have no pics of any because I have not tackled any of those in a lot of years.
I'm game though if you want to take the plunge. And if you want to tackle it I'll take over if you get in over your head.
I'd suggest that just adding liners to the existing handles is a waste of time based on my experience. You are far better off to buy a sheet of green canvas Micarta or some other Micarta or synthetic and use some .040 or .050 titanium or stainless steel for the liners and go from there.
STR