Bluejeep,
I got the gauges from a company called luxford autoparts (
www.luxfordautoparts.com). I looked at the box that the trim rings came in but there was no info on them at all. The guy I got them from said that the trim rings were designed specifically for the TPI set. The fit is awesome, nice and tight and the install was very easy. The new vintage gauges are sweet but just way out of my budget.