Good luck with the repair, At least you know its possible.
Had similar with a K1 750, working on the motor and found a load of epoxy resin around the front of the sprocket. Damage where the chain had popped in for a visit. I was very fortunate as a mate had a bit of Kawasaki case that could be made to fit and had it welded up by an FIA approved aircraft welded. Only cost me a case of beer too.