Marble Arms makes one but im not sure if its what you want
http://www.marblearms.com/improvedPeepTang_info.html
Manufacturer Model Sight Base # Screw Set # *Upright Selection
H&R Buffalo Classic 991001 995026 Short
Here is a better pic
http://www.buffaloarms.com/Detail.aspx?PROD=161205
Last edited by Gm54-120; 05-22-2015 at 10:10 AM.