CO2 Check Valve

[Johnny Reefer]

I will soon be setting up a Ca reactor. The instruction manual highly recommends installing a check valve for the CO2 line. Any old air check valve is not recommended. The reactor did not come with a CO2 check valve.

I'm not having much luck finding this available in Canada. I'm looking to get one of these...
http://www.marinedepot.com/ps_ViewIt...ry~FICOCV.html

I've never ordered anything online from the States before and am reluctant to do so based on horror stories I've heard on massive shipping and/or duty charges.

Does anyone know where I can get a CO2 check valve in Canada?

Has anyone (from Canada) ordered from "Marine Depot" before? (I'm thinking someone must have). How did it go?

BTW, I hope this is an appropriate post as it appears to me that no sponsors of this site carry what I'm looking for. Therefore, I do not consider this stepping on anyones toes?

Thanx much,