here is a listing of possible repair options
US
KEH.com (GA, Most current and vintage gear)
Eric Hendrickson (Vintage cameras, Current and vintage lenses)
Precision Camera (Authorized to perform warranty service, NC)
Advance Camera (Most current and vintage gear, Portland, OR)
General Camera Repair (LA, CA)
Garry's Camera Repair (IL, select film SLRs)
International Camera Repair (LA, CA)
Halcyon Cameras | Vintage Camera Restoration (Vintage film cameras, San Diego, CA)
Camera Repair Japan (Services Sigma lenses and more, Atlanta, GA)
Allied Camera (MN, manual film cameras)
Bill Rogers Camera (LV, NV, film-era cameras and lenses)
Phototronic (Topeka, KS, film and digital camera repair)
Lezot's Camera Center (VT, film SLRs / medium format)
Read more at:
Pentax Repair Facilities (Wordwide listing) - Page 11 - PentaxForums.com
I have used Phototronic.biz here in Topeka
Quote: Contact Phototronic (aka Fix Old Cameras)
Call (785.233.0231), or drop in.
Love to talk camera repair with you,
so please do contact Phototronic during customer counter hours.
Due to an unmanageable volume of emails the email address is not listed. Please call between the posted customer hours so that you might have your questions pertaining to the repair of your equipment answered. If you decide to send equipment you are interested in getting repaired via a shipper or you drop equipment off personally you will then be supplied a contact email for your convenience.
phototronic.biz
119 NE US Highway 24 STE B, Topeka, KS 66608, US
(785) 233-0231
Customer Counter Hours 12:30 - 6 M - F
Request Quick Time
Unlike most repair shops that process repairs in a chronological order, at Phototronic equipment is repaired on an as needed basis, thus avoiding completed equipment sitting on the shelf waiting to be picked up, while needed equipment goes un-repaired
https://phototronic.biz/
I would recommend giving him a call