417th Infantry was originally constituted as one of four regiments assigned to the proposed 105th Infantry Division. The division was never constituted or organized and the regiment was later assigned to the 76th Infantry Division. You may be able to contact someone who served with him through the division's veterans association. The most recent address I have is:
76th Infantry Division Association 450 Jackson Avenue New Windsor, New York 12553-8913
You might inquire as to whether there's a regimental association.
What miltary records might you be waiting for? If you've sent a request to the Records Center in St. Louis, be prepared for a long wait (and a lot of bureucracy). If you have the info required to complete the forms - you don't need the the file you're requesting (if, in fact, they even have the file).
If you haven't already, you can order his deceased file. You'll find practical instructions at Message #2112. Go back to the Main Page, enter "2112" in the box in the upper right corner marked "Jump to #_____" then click on "Go". This file usually - but not always - contains a document that indicates, among other things, the exact locale of death.
His remains were returned in accordance with a repatriation program initiated in late 1946 or early 1947. Remains, when recovered, were buried in the nearest temporary military cemetery. Shortly after the war ended, designated next-of-kin were contacted and allowed to express their desires as to the final disposition of remains. For those families who opted for return, the procedure routinely took about a year.