I ordered the Meanwell SD-15A-5 today. It's a considerably smaller form factor than the SD-25A-5 which the original poster used. It measures just over 3" x 2" x 1", but can still deliver 3A, more than enough for the Touchstone.
However, every place I called had a minimum order of $35 - $50, so I had to get two. If you'd like my extra for cost (~$25) + shipping, just send me a PM and we'll make it happen.
The datasheet is here:
http://www.cdiweb.com/datasheets/mea...SD-15-spec.pdf