If you can get the UL file number (e.g. E123456) for it, we can find out who actually makes it. I haven't seen a good enough shot of the label to tell if it's printed on there or not. The one pic I've seen you can just make out the RU symbol. Apparently it's a server PSU as it lacks an on/off switch on the back of it. And it looks to have a nickle plated case - that tends to reduce the possibilities somewhat as few still do that. Could be a Channel Well
.bh.