Here's one I got from Lew Lipset, who obtained it years ago from Charles Bray ("Bray 60" is written in pencil in small letters on the reverse). I like the history of the card almost as much as the card itself.
As for the Joss, I know of one in the past 10-12 years that has traded hands, in a private transaction. Obviously that's purely anecdotal, but my opinion is it will be a challenge to track one down. If you can find me a Lajoie that's for sale, I'll find you a Joss.
I don't have an answer regarding the composite, but your post triggered something in my memory about a collector a few years ago e-mailing me scans of a few cards from this series, and one of them pictured multiple players on it. Until I find the scan, I can't stand by this 100 percent, so I'll keep searching. My fear is that the scans were stored on a desktop PC that has since died.
EDITED TO ADD: I misread your question about the composite. Below is a scan of one that just sold in Legendary's auction (image is from their website). Is that what you're referring to?