Trying to find out if there is a version of the old Bausch & Lomb bases (adjustable) that will fit on the SB2? I see they used to make them for the older H&Rs (300,301,330,370,317,360) but I can't find anything saying you can get them to fit on a handi. Anybody know what specs the SB2 holes / barrel contour matches up with? Is there some other gun out there who bases would match a new NEF?