Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
Please see this thread for updates. Update Thread
SOH ADMINISTRATION....take a look through this library http://www.flightsim.com/vbfs/fslib.php?searchid=28976415 Over there they have a large compilation of old gauges. HGHB used to make a lot of them. In addition, if some guys have some of the old planes files away they may have gauge folders in them that could be utilized. Remember in the era of these flight theaters there really wasn't alot.

To open CAB files I have found this site that gives instructions on how to do it.
http://smallbusiness.chron.com/open-cab-file-54278.html
You can use FS98/CFS/FS2000 GAU to BMP utility to change gauge BMPs.
http://simviation.com/1/browse-Panel+Design-101-1
That maybe the best we can do unless some one want to take a crash course in coding.