If you want a lever action rifle in .32 H&R to match the pistols, Marlin makes one. I've seen a few in action at matches, and they seemed to work pretty well. It's really not too big of a deal to have a different caliber for your rifle, though (lots of folks mix and match with no difficulty).
My wife and I will have to wait until tax return time, early next year, to seek out any more cowboy guns. We already traded lots of new fangled guns to get started, but it's been worth it.
Have fun at the range with those new shooters.