Here's his ali store and you can "contact seller" from there (hover over the store name at the top left and the window that appears has a contact button in lower left). https://convoy.aliexpress.com/store/330416
You could post in the main Convoy thread, too...he's very responsive there. Or click on his profile and send him a private message. https://budgetlightforum.com/t/-/54654
I'm curious about the answer, too.