need some help from the folks

my wife likes the idea that I need a "reminder" of my place. we've talked about what it should be and decided that it should be more private than public. we've looked here and a few other sites and found a good idea. she saw something called "glans ring" also called a penis crown. it's a band style ring that fits around the shaft at the base of the head. being a flat band we(she) could have it engraved with the date she made me a cuckold and maybe the intials of the guy that did it. she agreed that it would be an acceptical form of mild offense for me and I won't have to be embarrassed in public trying to explain anything! our question is this:
we've surfed some and have found 2 websites that have these things. one was maturemetal and the other was steelworkx. does anyone know of any other sites that sell these rings? we've "googled" the terms and there's thousands of post's but there's so many that its hard to find good companies. if anyone could help us we would be very grateful.
thanks