Hi Carl,
We are always happy to have more hands.
I suspect that you are looking at one of the more recent regions. It looks like it
hasn't been enabled in the account and that will be the change needed. Until then, you
shouldn't have difficulty finding and using the Fedora images published in the AWS
Marketplace.
https://aws.amazon.com/marketplace/pp/prodview-doqa62vonqvo6
Also, the snapshots have copy permissions, so you can copy the image into your own account
to any region you would like.