Kaehr Plating here in Albuquerque: https://www.kaehr.comThey have done military and industrial spec plating for years. They did business with my dad's machine shop for probably 40 years. Anything I need plated or powder coated goes to them. Even if I didn't live here, I'd ship my stuff to them.
Plating and anodizing are qutie a bit different. One of the anodizers I tried bragged that they handled a great deal of Boeing orders. We sent them about 10 samples of machined alunminum to be anodized black, they actually returned some of the parts and said they just couldn't figure out how to get it to work (the parts came back bleachy looking). They also dropped one of the larger parts we sent and put a big dent in it, then blamed us for it.
Oddly enough, the only place that did a good job is also in the Southwest.