I don't know of one, but I think the Moto Guzzi Spada 1980 ish 18"- 2.15 one is a direct match for the spoke shape (so are the discs) There may be a "guzzi" casting mark, but you'd be pushed to find it. I'd be interested to know if the 2.15 front rims on the 900 are marked "Benelli" or have guzzi sandcast into them!
By the way, bear in mind the disc surfaces are machined flat on these rough sand cast wheels in any event, so before you go buying a wheel - check if its not just warped discs. That is a very common problem on the brembos.
I'd be very surprised if there was a problem with the wheel unless someone has tried to repair it after a bad ding. Unlikely to get damaged on the disc facings unless it's suffered underwater corrosion levels- even then you could shim the disc face after machining flat. Good luck anyways.