There is a posting on gunbroker that is selling Bulgy FSB, GB, RSB & HG retainer for $115 plus freight. http://www.gunbroker.com/Auction/ViewItem.aspx?Item=270089283 I received mine the other day and they appeared to be new.
If you have a hyd press & drill press it real easy to mod your shooter! There is also this to make life easier in the removal/replacement of your parts: http://www.akfiles.com/forums/showthread.php?t=93374&highlight=rforbus
Just drill out the dimples, press off, press new on, drill 3mm holes or #32 bit & little filing and your done! Without the poss