I'm looking for a decent retention holster, but I only really need it right now for 1 specific event, and I don't know when I'll ever use it again so I don't want to spend a lot of money on this. I was looking at the Blackhawk SERPA holsters, but they cost more than I'm prepared to spend on this, ideally I want to spend less than 50 dollars as I may only be using it one time (I'm going to be open carrying at an event to protest the original policy of the event, and the anti-gun douchebag organizing it.). So does anyone know where I can find a decent retention holster without spending allot? The pistol will be a Generation 2 Glock 22.