Really not sure that is an option, I'm sure their repair department would only be allowed to use parts from their mfg's or suppliers versus a refurb place. I will call them and check tomorrow, however, I have no idea what to look for or order.
$7,000 for a fridge, that is crazy! I don't think I could find a place in town that has something that expensive, nor would I ever spend that much for a fridge.
Our last two Sears Kenmores lasted 10-15 yrs each.