FYI they also came with the CX650C, CX650E, CX500E, CX400E, CX500 Turbo and CX650 Turbo... in case you wanted more keywords to search with.
I'm looking for a set of GL650 Valve covers and bolts for them. They look like this
Thanks! I'm located in Utah.
You'll also need the longer bolts if you're swapping from conventional CX500 covers.
1981 CX500 B(?) Shadow