I used City Spring in Edmonton. I got a copy of the original spec sheets for my 1 tons front springs and they whipped me up a set in a couple days. I think the closest one to you, though, would be in Regina, Saskatchewan. Might be cheaper than US made? Our dollar is pretty low right now vs US dollar. $1 vs $1.35 ish.

1970 Chevrolet C10
Grandpa's -- My first truck -- In progress to shiny
Follow the build in the Project Journal
1950 Chevrolet 1-Ton Dually
"Ole Red Girl"
In the Stovebolt Gallery
More pictures here
1951 GMC 9430 1 ton dually--Shiny! | 1972 Chevrolet C20- Rusty- the puzzle box lid for the C10 | 1962 AMC Rambler American- my wife's
Parts trucks-
1951 GMC 9300 | 1951-GMC 9430 | 1951- Chevrolet 1300