From your link: "KC SMITH GROUP INC Distributor of classic restoration Chevrolet and GMC Truck parts and accessories for years 1939-present"
It doesn't say "Manufacturer"
FWIW
I never said K.C. Smith was the Manufacturer.... they only import the individual component sheet metal panels & send it to Premier where they put it all together as a complete cab.
If you read further you will see that " Mirota Company." in Taipei Taiwan is the manufacturer.
https://www.importgenius.com/importers/kc-smith-group-inchttps://panjiva.com/Kc-Smith-Group-Inc/18775456If the sheet metal for the cabs was manufactured here in the States.... the complete cabs would cost over $15,000.