Take a few shots of the mount on the back of the dish.
Maybe it'll look familiar to someone.
What are the measurements of the dish? Height and width.
I assume it's stamped steel?
Where did you find it?
edit: you might also look through this thread for ideas.
And pay particular attention to my answer there, if you are stumped.
Well it is was white, looks like my LNB arm on my dish, Now it is painted and the picture is a bit fuzzy but it looks like a Fortec Star! I would say it is a Fortec Star dish! I would say a 80CM. Docj, get us a picture of the dish mount, where the dish mounts to the back. If it is a Fortec Star, the holder can be bought HERE!
Try finding the "sweet spot" with some small mirror pieces on the dish and a pocket laser pointer. You can probably fab something pretty easy for most any lnb once you have a good idea where it wants to be.