Cheapest way to get an AMD framework laptop?

Yes the Framework Outlet is your best bet:

It gets you a fully working Framework laptop at the lowest price ever, it gets you a warranty, and it gets you into the ecosystem. Upgrade as funds permit, although this could work for you for years as-is.

Since you’re in Canada, the next available opportunity to get a 3rd party charger, SSD and RAM at clearout prices is Boxing Day.