[rorygibson]

Hi! Late to the party, but this is exactly the kind of problem that my startup, Trolley, solves.

Warning: shameless plug.

It's a no-code shopping cart that works with Stripe. We offer digital downloads that work as you describe.

You could check it out - https://trolley.link

(you can email me direct at [e-mail] if you want to know anything more)