Hi Skip,
Have not heard from you for a while. Hope you are both keeping well.
I too have looked at, but not purchased, a TPM. One I saw (don't remember the brand though) included temperature monitoring. I thought that was a good feature, because it may indicate an impending problem, such as a blow out, before the pressure actually drops. This type requires installation inside the tire, rather than on the valve stem. Pros and cons to that arrangement.
Here is one at CW:
Temp & Pressure Monitor
I will watch this thread and see what more I can learn.