I did not. I ended up buying the rifle in the "some assembly required" fashion. Basically I bought a box of parts which had about 80% of what I needed. I bought the balance of the parts and shipped them to a friend in New Mexico for assembly. He is an 85 year old Navy armorer. He is assembling my rifle with the greatest of speed, which so far has been about 2 months. He does excellent work, but he takes his time. The current holdup is that he does not have a chamber reamer, but he is in the process of getting one.
I don't now the specifics of how he is going to do it, but he did not seemed concerned. I was also wondering the same thing, but he is the expert and he will get it done, though it may be 6 more months. This guy has all the neat M1 and M14 specialized tools, so I fell confident that he will get it right.
As a side note, I am trying to find out when the receiver was made. It is a Springfield Armory M1A with a serial number of 206xx. I called them, they gave me a number that no one ever answers. Anyone have an idea?