I want one of these so bad...
http://dayton.craigslist.org/cto/2574610080.html
Not mine, not affiliated, etc
ooh...it's got quite a bit of rot! 
Classic plates for an '87 Civic?
I must be getting too damned old. 
Ouch, I didn't check out the other pictures. I imagine the panhard mount is about ready to disintegrate. With that kind of rust $500 is probably pushing it.