Currently, Chris charges US$80 for a Retina CLA. That includes return postage. Cocking racks on the IIa and IIIc are additional ($20 for a replacement rack). US airmail shipping from the west coast is 6-8 days at ~$12, and Chris has 1+ weeks turnaround, depending on what's ahead in the queue. Top notch work, though. This is the second camera he's done for me. Drop him a line, he's always ready to chat about Retinas. See http://homepages.ihug.co.nz/%7ESrawhiti/index.html
for contact info.