When I still had my shop in Maplewood in the 70's and 80's, STL Plating did all our chrome work on the race bikes.
Their quality at that time was excellent...but as Paul mentioned...their prices were better than most but still high.
We did quite a lot of work with them and quick turnaround was a big factor as well.
The place was disorganized, but their people were very experienced.
Unfortunately, you only went there during daylight.