I bought a T/C ladder rear peep sight a few months ago from Gun Parts Corp. I think I paid less then $40 for it. It was an old new part in the origional bag. I should buy some more of them at that price and sell them on Ebay and make a few bucks. The ones I see on Ebay sell for over $100. This sight fits on the tang and you have to replace the front sight with something quite a bit taller.