I did some search yesterday and the cheapest I found was on ebay, so I ordered it.
I just checked kensfish, it's really cheap but the shipping cost is insane!
There used to be a big al's in Montreal that carried eheim parts of all kinds, and now I believe the store is called aquatica (beside hwy 40) in the west island. I'd give them a call I bet they have it.
That's good to know! I went there 2 weeks ago in my search for driftwood, I didn't know it used to be a Big Al. I'll keep this store in mind next time I'm looking for parts.