Joe S.
Hunter
Maybe old news but my first time seeing these. I had the 2 dogs sight on one of my old ones but his guy is so busy it may be a while before they are available.
http://parts.bowenclassicarms.com/index.php?main_page=product_info&products_id=59
http://parts.bowenclassicarms.com/index.php?main_page=product_info&products_id=59