I snagged a 'new in box' 7150-c12 for cheap. It booted clean with no errors, had all the accessories. May actually have been new in box. I booted it to Linux and am using nanddump to a USB drive to see if straight cloning the mtd partitions over to my switch with the bad certs might fix it. Since the bad switch kernel panics when any ethernet links are brought up, it's pretty much a brick with pretty lights anyway, so I have nothing to lose other than time.