The 32-20/32 H&R convertible Blackhawk, and the 38-40/10mm version were specially made for Buckeye Sports in Canton Ohio, and are pretty highly valued nowdays. Maybe Lipseys would consider a re-issue in stainless, so as not to jeopardize the collectors values of the Buckeye editions?
Failing that, a 30 Carbine BH can be brightened up considerably with a rechamber to 30 Paxton, however the barrel twist is a bit on the lazy side for bullets much heavier than 110 gr. The dies are horrendously expensive as well. Perhaps a wildcat cased on the 357 mag or a shortened 357 Max case sized down in a 300 Blackout die? I'd have to check out the chamber dimensions at the base of 300BO vs. the 357 cases.