Thanks everyone, found this supplier per his great youtube videos. In addition to kits, he sells individual parts like springs, needle & seat, gaskets etc.
Mike's Carburetor Parts in WA State. And I'm saving National Carbs to me favorites also.

http://www.carburetor-parts.com/B-BC-BV_c_146.html


It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed