Transfer Design Asset Workaround?

Hi all,
I’m working on a website for someone using Editor X under their account email. I have my own free Editor X account just to play around in. Here’s my conundrum: While waiting on info and images for a specific non-visible page, I created a couple of design assets as a placeholder/template. They’re absolutely absurd and stupid, but they make me laugh and I’d like to hang onto them after the project is finished. Haven’t found any information on transferring design assets between accounts (this would be a helpful feature). Their website is already live, premium, and connected to a domain. I’m considering creating a new free editor x webpage on their account and transferring it to myself as a workaround. Has anyone tried this? I don’t want to make a mess of things and have already had a slew of glitches and nonsensical things occur with this platform, so double checking with all of you first.
Note: One of the Design assets has 3 different lightbox popup designs attached to it. Haven’t found a way to transfer these to other pages or store in design assets.

Thanks in advance!