This looks like a pretty good deal:
http://www.trackofthewolf.com/Catego...83/1/RS-57-SML
I use the Williams on my inlines, but just don't think you can mount t far enough back on the renegade to do well. But maybe, if you tapped holes are the very rear, it might work. However, not with the stock peep aperture. You would need to buy a larger bore peep