|.32 H&R Magnum (Center) compared to similarly sized cartridges - Drake00 at English Wikipedia [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons|
My sources for this list have included Wikipedia, the Smith & Wesson Forum, firearms manufacturer websites and various online gun sale sites. There are undoubtedly more different revolver models chambered for .32 H&R Magnum and I will update this post as I come across them.
H&R Model 532 - .32 H&R Magnum (pull-pin cylinder)
Freedom Arms (Model 97 - chambered for .327 Magnum & .32 H&R Cylinder available)
Dan Wesson DW 32
Ruger SP-101 (KSP-3231X)
As of this writing, I believe only the Charter Arms Undercoverette and Lady models are still being produced for .32 H&R Magnum. Ruger is still producing firearms for the more powerful .327 Magnum cartridge.