You can still find ppc barrels at brownells, etc. They have full bull and slab side barrels. They're actually pretty reasonable. It shouldn't cost you all that much to get a used Smith 10 (or the stainless version) and throw a ppc barrel on there. If you're set on .357, same barrel logic applies with a slightly more expensive gun.
These are the K frame barrels that I mentioned.
http://www.brownells.com/handgun-par...-prod5021.aspx