Just 5 months?!?!
These folks up in your nexk of the woods seem to have a lot to say about block heaters. Might want to consider giving them a ring..
Thanks for the p/n. I’ll post in the Parts sticky if they’re not already there.
OP, another option is to get a second set of OEM wheels (scan the GT350 Classified section, they come up from time to time) and put a set of performance winter tires on them.
This is what I did - found...
Wow, that’s an early one! Within the first 200 produced.
This website has some of what the Owners Supplement included:
I hope you find the original! Good Luck