Vapor Canister Question

[mgm60]

Thanks to the members that identified my vapor canister question (what is this and do I need it). So now that I know what it is and reading up on it, I started trying to figure out how to hook it back up as my truck is pretty much original under the hood and I do get the smell of gas in the garage when I park it.

Unfortunately the outlet to the carb is broken off even with the top of the canister and this one appears to be original and worn completely out.

Does anyone know where I can get a replacement designed to work like this one did? I looked at several on line last night as GM put a billion of these in cars and truck in the 70s,80s and 90s. But I can't tell which ones would work in my 72.

Second question. Which vaccum connection on the carb does this go to? The one on the right front of my carb is blocked off but I think thats actually supposed to supply vac to another location (maybe distributor?).

Pic of canister attached.

Thanks
Mark