A family friend gave my son a Bushnell Voyager 4.5" reflector. The scope is not half bad with a good eyepiece, but the finder is trash. The straight thru 8 x 21 mm finder on my ETX-90 spotter would fit in the holder, however. But I'm using mine. I know many ETX owners have replaced theirs. Would anyone sell me a leftover straight-thru 8 x 21 mm ETX finder or something similar, dirt cheap?