I will probe the harness of the instrument cluster for voltage and see what I find. Research says two other places to look related to battery power fault, a Battery Relay that is beneath the windshield shrouding, and a battery Control Module in the back. I can see both of these units but there is trim to be removed in order to test/inspect them.
For a new cluster the only option seems to be the dealer. Cost for a new cluster is CAD $1,125.00 list, plus the labour to code it.
I have a related question for folks who might know - seems like it is possible to replace the cluster, central gateway, and two other boxes, and have everything work?