I may have what you are looking for and modifying it as you plan to won't hurt anyone's feelings from cutting up an original part (smile). Seriously, I would have to repair-- relatively minor though---this swing arm and I prefer to find a better one not needing any repair. It needs the small vertical tab where the axle adjuster eye bolt goes. It's missing.
So, if we can find a good one I will let this one go. Markus had one on eBay that I got cheap on my bidding and I missed winning.
If you are still looking what do you think?