The tuners are made by Alps. There was a thread in this forum a while back where someone posted info on the tuners and was looking into finding a supplier for them but I never saw the outcome. You might want to search around here and see what you can dig up as I'm pretty sure it's been covered.
Please don't PM me or any other members looking for personal assistance. You'll do better by posting (after you've exhausted the search feature, of course) and taking advantage of the collective expertise of the membership instead of a single individual that may or may not be able to help you. Thank you and enjoy your stay at DDB!