ThunderPSU for Dreamcast is now in stock, actually it is been so for little while now. You may check it here in the store: https://thundertronics.net/product/dreamcast-universal-power-supply/
Some quantity is making its way to Stone Age Gamer as well, and I am in negotiations with European supplier to have some as well but nothing is certain now.
As of writing this post, 60 units in stock at the store and 80 units sent to SAG.
Best regards,
Hossam “VEGETA” Moghrabi