Transfer demo from one workspace to another

While waiting for my org's admin to send me an invite to our supademo org, I signed up for a supademo account and created a demo in my own account.

Now that I've been added to our org's account, I'd like to transfer those demos to the org's account.

(Barring this, some way to export the demo and re-upload it in the org would suffice - we can update the links ourselves.)