FWIW, I can tell you at least two different phono preamps that I had issues with. First is the Vincent PHO8. Has a separate power supply and everything. Quiet as a mouse, but not engaging or musical. I kind of had the same experience with one of their preamps too. Then there is the famous Jolida JD9 which has great sound, but the unit that I got used had a slight hum problem. Ok, let's just skip to the end. Don't do it. I lost my ass on this whole deal.
Now I don't recommend going expensive like I did (expensive for me anyway). I ended up with a Glass ware Audio product that I built that was more of PITA than anyone can imagine. Again, not to tell the whole story over again, but a bad bad idea for me!
To do over again, the Pete Millett phono pre and yes, power it with battery. Oops, there is one catch though. I don't recall the PM phono to have much in the way of adjustment. Dammit. See? I thought that I had you covered, sorry. I will sleep on it.
FWIW, if you are a builder, that sort of thing can be accomplished with extra effort.
OTD had it right in the first place. There are multiple listings for the Musical Surrounding Nova II phono preamp at eBay. $480 and up.