I contacted the head guy that Matt400 worked with direct, asked for the TDR designed dual gauge, gave credit card #, and it showed up via UPS 4 days later with no problems. If you do a search under my user name you'll find the post I did with contact info. I believe the price I got was still pretty close to if not the group buy price that Matt400 arranged months earlier!
I was looking at the Kennedy Diesel (Duramax) website a few days ago and noticed that they sell SPA gauges...