Lipsey's has an exclusive large frame stainless Blackhawk in 10mm with 40 S&W conversion cyls, available in 4.62in and 6.5in barrels. It's been tempting me for weeks now. I'm pretty sure I'd have bought one by now if I wasn't undecided on the barrel length.
https://lipseys.com/itemdetail?itemno=RUKBN-104X
https://lipseys.com/itemdetail?itemno=RUKBN-106X