YBA preamp PSupply help

I just picked up a YBA 2 Delta preamp with no power supply.

I am looking for the voltage/watt requirements for this preamp. It looks like the original PS is a wall-wart with xlr plug in, while owners seemed to have been able to purchase an upgraded PS. I would like to figure out if there are perhaps some viable alternatives to the original power supply.

The YBA 2 delta amp it came with has great low-volume clarity upon limited listening with a PSE HL preamp, but I would really like to hear what it sounds like with the YBA preamp.

Thanks for your input and help,
Call michael at audio plus services. Very helpful and they were/are yba distributers.
Thanks, appreciate that, I will call them. The YBA 2 delta amp that came with it is an impressive sounding piece.