Mechanical temp gauge question

I have found a bunch of ways to do it. Auto meter's website has a bunch of fittings and some cool stuff to put the sensor in different spots, even into the rad hose itself. My problem is that all the tech support guy's could come up with is to buy another gauge.
There defence is "it say's on the box that it may not fit all applications".
Maybe ask to ship back the one that does not fit and pay the difference on the one that will....or might LOL.
Anyone need a temp gauge *grin*
AL