I use a Gould & Goodrich B61 which is like a Don Hume JIT Slide.
It's a small OWB holster that does good job carrying a light revolver like the Bulldog. Either the G&G or the Don Hume that fit a Detective Special will work, and both are only about 25 bucks on eBay and Amazon.
The downside is that these small belt slide holsters are open muzzle, so you have to be more careful with the gun so you don't bang up the muzzle on things you might bump against.