I have a LNIB Williams WGRS rear peep sight and .570" gold 1/16" bead front for sale. Both are in excellent condition. I just decided to go a different direction. If you purchase the rear alone, chances are you WILL need a taller front. I have done a very slight amount of filing to the bottom of the dovetail on the front sight for fitting.
$50 shipped for the set. I will take USPS money order or PayPal. The first to say "I'll take it" followed by a pm will get it.
Thanks for looking.