Truck Shop has them in their catalog. From what I have seen they seem to be good quality. Brothers and everybody else has them also. They most likely all get them from the same source. You are right, they are expensive.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine