It looks messy, but.....I'd have a crack at rebuilding it.
That headstock looks ( I did say looks) OK, though the inner barrel will be mashed (replaceable). Are there any fluids leaking out anywhere?
A new front end, radiator, plastics with a few ancilliary bits and you could be back on the road.
How handy with a set of spanners are you?
Call Jim at bike enders and see what bits he has.