Call one of the big U.S. restoration parts vendors like Year One or NPD or look on ebay. The rubber bits may not break you- but the complete housing assembly will run you quite a bit (as in hundreds of $$$ for a repro- thousands for an NOS piece).

Actaully there's a company in hamilton that is famous for they're repro dual snorkel setups. There in the back of magazines all the time...found them...

Unless you happen to be the lucky one who finds an old guy with a "cars in barns" thing going on- it's pretty unlikely anyone just happens to have a genuine ram-air cleaner setup they want to get rid of "cheap". You'd have to live in a pretty deep hole to not be aware they're worth $$$'s these days.

You can save brokerage/shipping charges- Year One has a number of dealers in Canada that carry their line (they order a pile of stuff for customers, and spread the shipping/brokerage charges across every item on the order before adding their markup)- one is in Stoney Creek or Burlington (don't remember their name right now but they used to run ads in the Tri-Ad and I think that Barrie-based classified paper "The Bargain Hunter".