The Orion Starshoot autoguider worked for me until I replaced it with a lodestar.
http://www.bintel.com.au/Astrophotog...oductview.aspx
Also, the same camera is rebadged as a QHY model.
Not as good as the lodestar-- more noise and less sensitive-- but half the price and as long as you get a nice bright guidestar it works fine.