Here is the diagram exported as a JPG. If you look at the orange wire coming off the IGN fuse, it splits off, so if you follow it it connects to the 4WD actuator, Front ACC plug, Neutral relay, foot brake switch, gauge pod, left handlebar controls including a small switch for the hand brake. Your front accessory plus is probably under the pod by the steering, it is a 2 pin connector, commonly used to add grip heaters and winch controls. I would disconnect all these things, put a new fuse in, start plugging stuff back in and wiggle each. If the fuse blows before this, then it is a harness issue, probably at that splice. (common issue with 200X Cats) If it holds then plugging in one item at a time should find it. (fuse will blow again)

Hate too hear that, something went wrong, probably valve issue.

I would try to look for one like it, with a bad engine, or one that says ran fine when parked. You can usually get those cheaper than a frame. Marketplace would be a good place to look, you may have to travel to go get it. Or if there is a ATV salvage yard around look there, also around here dealer have multitudes of unfixable ATVs behind the shop may look there.