I have a board very much like that. XL, Dunlop Mini, and a Strobostomp Mini. It is on a Pedaltrain Nano.
The power supply is the Cioks DC4. The beauty of that is that it can run off of an external battery (mounted underneath) or it can run off of the power cable that comes with the Stomp (i.e., into the DC4). Noting the DC4 does need an adapter to join two of its outputs.
This setup also has 1 extra power output on the DC4 which I've used for various things (like, to power a monitor amp or a pedal switcher). It all works great, but I'm toying with getting rid of it since I'm now gigging with my Stadium.