I used this for many years, works a treat, and have only retired it on splurging on a 60mm finder-guider, which doesn't really do much more.
Started out life as a 6x30 finder. The eyepiece is gone, and in it's place a lathed fitting to allow a C mount camera to screw on. I used my Lodestar.
It has the original finder-mount, which I used for a while. In the end I used it hard-mounted to the side of my dovetail saddle, and never had a problem finding a guide star, nor guiding with most of my scopes, certainly up to my 10" newt (1250mm focal length).
Simple, and cheap.
AU$35 plus post.
Via PM please.
Gary