For a smaller one, the Taurus 9mm snubby works okay.
The Alfa Proj is on a medium frame. Its shape is pretty simple, but it seems robust.
The Smiths are nice, but cost around $1,000.
You can get an Italian SAA clone in 9mm for around $500. They don't have adjustable sights, but they're very nice.
The Ruger Blackhawk is available with a 9mm cylinder and has adjustable sights.
I think it's the Taurus Model 692 that has swappable 357/9mm cylinders. My 22lr/22mag version worked fine.