I have taken my model 59 when I hunted deer in Wyoming in case a predator came upon us and I carried it OWB in leather holster made for a 1911.
Retention and fit was very good.
I would suggest if you have a large LGS that has a good supply of holsters take it with you.
Check Ebay, I've bought lots of great quality used holsters on there for most of my guns. It might take a week or two for the perfect one to pop up but it works for me. I like Bianchi, Tex Shoemaker and Bucheimer a lot.