09jones, in Canada the operative words are "be patient". We don't have the depth of supply in the marketplace the US does. The upside is typically prices are a lot less. I'm speaking of older guns here, not new. Follow the Equipment Exchange on the Gunnutz site in Canada. Sooner or later something will come up that will be what you are after. It also helps to dial you into pricing. Find a gunsmith you can trust who can properly measure barrel wall thickness.
Spend time on this forum.....reading. You'll learn a lot. I started about 8-9 years ago and knew virtually nothing about SxS guns. I know a hell of a lot more now and it just about all came from here.
I have only one gun that cost over 3K, and only one other that cost over 2K. But I'm pretty happy with the assortment I have and have something for just about every purpose, be it lightweight upland or wet goose shooting.
Do your best to learn and then buy rather than the other way round. It's cheaper that way. LOL