1968 Small block Valve/Rocker covers.

http://orangecounty.craigslist.org/pts/4395456083.html
There's the Craigslist link.
I have a pair but I would have to pull them from a engine that is started 2 or 3 times per year. I've got later model covers and cork gaskets I could toss on.
I'm south of the border too so I cant beat the Craigslist deal.

* Thank You.