Is there a way to migrate non-downloadable sketchfab assets to FAB?

I am a bit lost here. If i want to sell an asset, why cant i upload it first in sketchfab, mark it as non-downloadable (since store doesnt exist anymore) and then migrate it to FAB? I would like the sellable asset to be eventually visible from both platforms (with a link to FAB from sketchfab). Am i missing something or is it something we can't do anymore as well?