Contact Williams Gun Sight Company at 1 800- 530-9028 and tell them what you have. They are also a T/C dealer so should know what will work.

Marble Arms in Gladstone Michigan also sells peep sights and they do have some tang mount models.

Lyman also has peep sights and several tang mount models.
http://www.lymanproducts.com/lyman/s...ang-sights.php

Military rifles do not have tang peep sights. They are well forward on the receiver.

Al