Here's another bluing/plating/Parkerizing service recommended by IthacaDave -
GunBlack, in Interlaken NY
http://www.gunblack.com/
GunBlack, Inc.
PO Box 357
8386 Main Street
Interlaken, NY 14847
Telephone: 607 532 9591 weekdays 7:30 to 4pm EST
Fax: 607 532 9257
E-mail: info@gunblack.com
I'm currently pulling my maps out to see just how many miles @ 15mpg and ~$4/gallon it would cost me to drive there & back, twice...
Edit; I cancelled that trip. It would cost more than the $130 shipping + FFL fees.