Wish I could point you in a direction but I think those things are pretty scarce. Just an off the wall idea, call Jack First out in Rapid City, SD, 605-343-9544. They have all sorts of parts, maybe one made its way into one of his bins.
My Nagant came with a cylinder, that was one of the selling points for me. It's going to need some fitting, the cylinder bushing binds.
I am sure it is just a matter of time before someone does.I really wonder why no one is cranking them out, surely there must be a demand.
Just saying the proof is in the pudding. It is best to have direct knowledge in such matters. There are things that definitely should not work. For many other things there is a gray area and you have to actually go out and try it out.I can't believe you are going to get any sort of consistency trying to shoot .32ACP from a Nagant. The jump before the bullet finds rifling with that combination is probably going to be pretty close to a world record (barring the Taurus Judge, of course).
Not that long ago, a couple of the online ammo stores was selling off their reloadable 7.62X38R ammunition (both Privi and Fiocci) for $15 a box, sometimes it was even with free shipping. I haven't recently checked to see if they sold out or not, but this is going to be cheaper than any fresh .32ACP you are likely to find. Might be worth a look.
I have just recently figured out how to reload for the Nagant. It is not difficult at all, and if you have a set of .30 Carbine dies, they can do double duty for you, and you wouldn't even need to invest in a die set. All you would need is a .32-20 shellholder and MAYBE a .223 sizing die to use to crimp the case mouth (my reloaded cases fit and work just fine in my Nagant without any additional crimp,
Probably the same reason that nobody is cranking out brass and affordable dies, or even affordable ammuntion.I really wonder why no one is cranking them out, surely there must be a demand.