DeSantis also makes a pretty decent vertical rig, though they tend to be a little on the large side (a lot of leather). Very stable though. They used to have a generic nylon one that was pretty well designed too. Safariland used to have a good holster comparable to the Bianchi X15. TripleK also offers a copy that is okay. The Uncle Mike's is an okay rig, it is well made but not a good concealment rig, though it has a nice offside plate to carry ammo and stuff.
Unfortunately, most of the major holsters do not make springbreak holster anymore, probably has to do with people switching to autos I guess. You can still find a lot on ebay or gunshows, or shop old stock.
myself, I have tended to stay away from custom jobs, it just never seems to come out how its supposed to be if you ever manage get it. Holsters are also a very personal fit, so it would be good to just go to a shop and ask to try one on first.
I agree to a degree with pete f, the two basic types are spring break front (sometimes with a strap, sometimes without), and pouch type. The Bianchi and Safariland were break front. The current Galco is a pouch type. Myself, I think if you are using a revolver, the leather break fronts retain very well because they clamp over the cylinder, and I am comfortable using them without a strap. Everything else needs a strap I think. The Bianchi nylon break front should use a strap because the nylon does not have a lot of friction (found that out the hard way). The Bianchi's had a removable regular strap on their generic leather models, and they used to offer a fancier one that had an intergral thumbsnap for faster draw.
The older I get, the more I like having a strap.