The card is a midi + mt32 + mercury unit V4 all in one card.
There's also a 10mb ram addon he sells separately which requires some easy soldering, but its already gone.
https://gimons.base.shop/items/89647862
He said on X that this is a low stock item, so I don't expect it to last long at all.
Already sold out! I managed to order one, excited to get it.
Congrats! I was sleeping so by the time I got the notice it was already out. Maybe next time.