Having trouble sourcing 2 more kegs. I think I might luck out with Lost Nation brewery (fingers crossed. For other Vermonters here's a list of where I tried:
Drop-in: Does not sell
Fiddlehead: Repairs their own, does not sell
Longtrail: Engineer wasn't on site, need to email to check but I'm no longer in the area.
Magichat: Leases their kegs, does not sell
Otter Creek: Does not sell them
Switchback: Sells broken kegs for 30$ but I bought the last one they had, may recheck since it's been a while.