5x5" Bolt Pattern to 5x4.75"

[Mieser3]

Needing some help here guys. I've found the wheels I want for my 1971 C10but they are only made with a 5x4.75" bolt pattern. I am running my original rear end with D52 calipers and Astro van rotors on the back and up front I am running CPP modular spindles with original rotors and D52 calipers as well. What options do I have to run a 4.75" bolt pattern? I don't want to use adapters. Is finding a machine shop and having them re-drill my bolt pattern my only option? Just wondering if anyone else is running the 4.75" bolt pattern on their truck and what they did to achieve it. Thanks.