Where in WA are you?
I have only ever gone to small shops, and have yet to find one where they wouldn't go over exactly what you want and let you hang around while you do it. Owning a biz is hard enough today, these guys want to do you right so you come back. The same shop has made the pipes for my '56, done a custom fit set from the collector back for a sports car, and repaired a couple other cars. One repair a couple other shops said couldn't be done without spending a lot more.
Never spent too much, they use quality parts, and never had an issue with them and send them biz any time I can. Ya have to ask around, but it can be done. Start with your local car clubs if there isn't someone on here that is more local to you.
1956 GMC 370 dump " 'Tater "1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI
I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P