How to add a product I purchased as a guest to my account so the product license is on my account?

I purchased the Go Pricing Tables on the Envato Market and when I went to download some demos, I needed my Envato account in order to verify my purchase. However I am working for someone and they bought it and checked out as a guest, therefore the purchase and order information is not on my account.

If a file was bought as a guest then to access downloads etc the buyer will need to create an account https://help.market.envato.com/hc/en-us/articles/217397206-A-Guide-to-Using-Guest-Checkout

Access to downloads etc. will only ever be available to the purchasing account and can’t be applied or transferred to another.