Need a suggestion for a holster...

[Heartland Patriot]

Need a suggestion for a holster for a Taurus Model 66, 7-shot, .357 Magnum with 4 inch barrel. First off, I would like to know if carrying such a revolver IWB is feasible. I'm not a big guy, 5'8", 160 lb. Additionally, though I know the adage "you get what you pay for", I don't have big bucks for the big names like Galco, as a for instance. I have two Don Hume H715M leather open-top IWBs that I like and didn't pay a lot for (I think $30-ish each). They are real leather and well stitched. Not fancy in the least, but they work. So, I'm looking for something like that. If IWB is NOT really feasible, then what sort of an OWB holster could hold a service-size revolver and yet keep it well concealed under an un-tucked button-up shirt which is how I almost always dress? I won't buy any of those nylon things and I haven't seen any kydex that really caught my fancy, either. I'm partial to leather, though like I said, it doesn't have to be fancy, it just has to work. Thanks.

*EDITED TO ADD: Don Hume supposedly makes one for the Taurus Model 66, but doesn't sell from their website, and I can't seem to find it anywhere...thus my search for something that can actually be purchased vs seeing it online but not being able to find it for sale.