Hi i have read your stories and i own a motobishi raptorex 2011 800cc (hisun strike differently named)
Hisun brand its part of the ghanzou automotive that own cfmoto,odess, hisun and few other brand of utv.
Check at cfmoto dealer for part. All driveline parts will fit on the hisun. It is what i have do on mine before it break and i never touched it again. The problem whit the yoke on hisun utv is a cast material and machining issue. If you are good in mechanic you can flip the coin and do brp, shaft and yoke upgrade (just need a good drive shaft shop to make new drive shaft