Good news, I've found a source for new power adapters if your warranty is up. Mouser (mouser.com) has part number 418-TRG150A480-01-V which matches all the specs of the original adapter. They are about $100. I've bought one and my SRW208MP is back up...
I am in the same boat - my SRW208MP's power supply just died, I am getting no output from it when tested with a multimeter. Was there any resolution in being able to order replacement power supplies? I'd rather not have to throw out a perfectly good ...