While trying to come up with an electric gauge for my 12-valve in the last few weeks, I called Isspro and talked to them. They, of course, were familiar with this campaign for the 0-25 psi gauge (Kelly was out of the office at the time). The word I got is that they were still in the early stages of designing this thing and nothing was imminent, yet. My feeling from them was don't hold your breath. It may happen, just not real soon.
You all may want to follow up and see if you get a different answer (i. e. talk to Kelly).
-Jay