Just as a note, Mr. John T. Callahan is retiring from being the Savage historian as of this week. He will be sorely missed.
He did let us know that information will continue to be available, but it will be from the following source. I have no information on when they will start providing the service, what it will cost or what the turnaround times will be. If anything along those lines is shared, I'll bring it here.
Savage Arms...
Historical Information
100 Springdale Rd.
Westfield, MA. 01085

I took this note from another site, but it sums up what I know so far. I'm sure many of you have had rifles lettered by him, as have I.