1954 super fastwin carb kit recommendations

[Smudges]

1954 super fastwin 15 horse needs a rebuilt carb.
anyone have a solid link to a rebuild kit? I see many options on the web, I want a good solid kit no cheap parts. Any help is greatly valued.
thanks much
Smudges

[Smudges]

Edit: The following is from the person who is working on the motor:
“Upon further inspection you might be better off trying to locate the whole carb. We found a lot of corrosion which is causing the adjustment knobs to be stuck. I suspect if we were to force them free they'll never fit properly and therefore never be able to adjust them.”