It there a contract for NFT with unlockable file?

I want to mint a collection with landscape format images as NFT in the manifold gallery, and have a portrait version image as unlockable. Is there a ready made contract for this kind of situation?
to make clear, the collectors buys the NFT and then can also download the portrait version.
the idea is to work with 3 editions for each NFT.
Would this work in the gallery? And if so, how do I do this?
thanks in advance!

Gm! Right now we don’t have any tools in Manifold that support unlockable content. This is possible with some marketplaces like Rarible and possibly some apps in the future!