When I did something similar with my Kimber Ultra CDP II, I used two 4-inch diameter stainless steel hose clamps. Holds it real tightly, but I'm having a bit of trouble using my IWB holster...
I think it will fit in my Galco OWB holster.
People give me a wide berth when I am down to the Wal-Mart 'cause they think I have a growth.
Bonus!!!