First, thank you all for replying to my post.
I had already called the new company about this dish and was told no-can-do. I was curious to know if people are still using them and if there's anyone that needs a replacement for the dish itself and the associated devices. After all, if they're that old--kind of going to be hard to find.
I hate to junk them though, so thanks for that lead, @Bill.Satellite. We hope to be in the Pacific Northwest next summer/autumn, so who knows, maybe we can just drop it off.
I just hope it's not too difficult to remove...