Thanks for the help beavs. The best I can tell from doing some research is that the antenna is a Prodelin 1194. The ku receive only feed for a 1183 looks like it would be just right for this antenna due to the fact they are the same reflector. Thanks for the link.thanks for the update billyboy_1. I see what you mean about the feed/lnb mismatch. there are so many different interface flanges. my suggestion is find out your antennas exact model # or part # (is the sticker on the back of the dish legible .... if so post a pic here). here's a good thread for you to read. http://www.satelliteguys.us/xen/threads/rebuilding-an-prodelin-andrew-1-8.326064/
look for a factory feedhorn for it. ok i was nice & did some searching for you (you're welcome ... its in the thread listed above btw) these guys sell prodelin stuff. https://www.sateng.com/satellite/receive-only-feeds/products.aspx
you can never have enough of those prodelin 1.8's (even to have spare equipment) so go get the EJ dish.