I have been trying to track down a new LED brake light assembly for my Nexus Class C. No help from Nexus but one of their dealers turned me on to State Trailer Supply. They found it in 30 mi utes and I drove down to Peoria yesterday and picked it up. They have the largest, most complete inventory of trailer/RV supplies {with very competitive pricing} I have ever seen... makes Camping world look like a 7/11.
When I checked their website I saw that they have a store in Idaho Falls {208 538-9358}. I recommend you give them a call. Good luck!
:C
OP here with an update:
I was worried that simply replacing the entire LED unit would not be successful as my mechanic and I suspected there were wiring issues. Start with the simple things... we replaced the LED unit with the new one from State trailer Supply {$41.99} and bingo, everything works.
:B