Ok, here is an archived version of the former US Authorized Repair/Service centers as of 3 Aug 2013:
https://web.archive.org/web/20130803161004/http://www.us.ricoh-imaging.com/s...roduct-repairs
Just in case it disappears here is a cut 'n paste
RICOH IMAGING Service Center
250 N. 54th Street
Chandler, AZ
85226
Advance Camera Repair & Sales
8124 S.W. Beaverton-Hillsdale Highway
Portland, OR
97225
503-292-6996
California Precision Service
1714 28th Street
Sacramento, CA
95816
916-451-1335
Camera Repair Japan
3435 Breckinridge Blvd, Ste. 130
Duluth, GA
30096
770-935-9771
C.R.I.S.
250 North 54th Street
Chandler, AZ
85226
480-940-1103
Forster's Camera Service
40 West 2950 South
Salt Lake City, UT
84115
801-487-1288
Photo Tech
1413 South King Street, Ste 201
Honolulu, HI
96814
808-952-6161
Picture Perfect Unlimited
25876 The Old Road, Ste 300
Valencia, CA
91381
818-998-5204
Precision Camera and Video Repair
3 Anngina Drive
Enfield, CT
06082
860-749-7380
United Camera and Binocular Repair
1062 Tower Lane
Bensenville, IL
60106
630-595-2525
You can count out the two AZ listings. Interesting to see that Precision is listed here. Looks like they were always authorized. KEH is not listed. This list was unchanged up to 15 Jul 2014. There is a gap until 21 Sept 2014 at which point it shows only Precision.
Edit: I just sent an email to Picture Perfect in Southern California asking if they are still authorize for Pentax/Ricoh non-warranty repairs and more importantly if they can get parts.