Oikos Tree Crops has them. They also sell many other rare plus hybrid oaks.

Sorry, I thought oikos had them but I guess they dont. Still a nice place to check out. Shooting star nursery is actually the one that has them click on the link.

Here is a link that might be useful: Shooting Star Nursery

I am curious why you want to grown them. Indulge me if you care to :)

Also I have ordered a few things from SSN. Very nice people to talk to and they shipped my trees very fast.

I recieved acorns last fall from someone on here and I can't remember who. They were sent along with Quercus imbricaria seed. I can look to find this info but I don't know if it would be worth it to you unless you can't find the tree for sale, being that you'll have to wait til next fall for the acorns. My seeds haven't emerged yet and probably won't til May. If I have extras and you can wait til fall I can try to keep an extra for you.

It was gardener365 that sent me the blackjack oak acorns, I dug around in the archives.

Bill, you've got email.