Grooveman, circling back to your initial post about this issue:
Did you locate the fuse you mentioned in that post? And I have not been to a local auto parts store to see if they still have the fob tester, have you?
If it comes to swapping out the entire system I believe armed (pun intended) with the wiring diagrams it would certainly be doable. Here is an example from one of the ‘modern’ systems for sale on eBay:
