Ford F series trucks used a vacuum reservoir through the 70s, 80s and 90s that looks like a coffee can or concentrated orange juice can. I think it was actually made by one of the can companies that supplied them for the food industry.
Anyway, one of those would look right at home under the hood of an AD truck. It's primitive enough that you'd think it was 70 years old.
Hit a junkyard and pull one from a wrecked F-150.
They come in two sizes as well, 1 qt and half gallon.
You can even buy them new for only $15.
https://www.fordpartsgiant.com/oem-1995-ford-f_150-vapor_canister.html
