Yamaha SG1000 style guitar?
The Yamaha SG 2000 series is not one that seems to have been available in kit form or have been emulated by other manufacturers, yet it is a classic guitar.
The thru-neck SG 2000 (or 3000) is clearly out, but a set neck SG1000-style guitar would be achievable.
It's also pretty close to another certain range of guitars in general terms of construction. Mahogany body + neck with a maple cap on the body, two humbuckers, 2 x vol 2x tone 3+3 headstock.
Something a touch slimmer and lighter than the original would be nice though, my old SG3000 weighed a ton.
Obviously any trademark issues would need to be cleared first, but it started out as a pretty derivative design to start with. Spade headstock, rectangular block or dot neck inlays, no need to copy the Yamaha double trapezoid ones.
Might be a nice mainstream guitars if other kits don't make a reappearance.