Currently it's only Charter Arms, but if you want to include .410 in that Taurus has their Public Defender.
As others have said, Taurus did make a .45LC only snub, but as with most of their guns people are interested in, they no longer make it. Taurus releases and discontinues so many guns that if there's anything, and I mean ANYTHING, of theirs that they are currently producing that isn't one of their common models (PT111, Judge, Model 85, etc. ) that you have even an inkling of interest in, buy it now.
One reason I think I may move that ported .357/9mm 7 shot revolver from the long list up to the short list. I think I'll wait until after April tho, I feel almost everyone is going to be offering a rebate this Summer/Fall to move product before the election.
But as to what's available for snub .45 Colts... not much. You may be better served looking for a snub .45 ACP revolver or looking at a .45 Colt only Bond Arms.