I bought this 5-pack on Amazon:
https://www.amazon.ca/Eclipse-Glasse...dp/B00712I3JA/ they were 36.42 yesterday 42.10 today.
There were still reasonable places on AirBNB a bit away from the zone. We're staying in Gallatin Gateway, nice condo about 2.5 hours from Rexburg, everything closer was ridiculous ($250/night for an RV camper!). Really looking forward to it. Hopefully it's not raining.