Repeating my first post, I doubt you'd find one.
while I don't know how to do it, you should figure out how to do a "Google search of this forum" - it has to do with putting the URL of this board into the search line. Do it for "electronics repair" and see what you find. Maybe even a search of this from the blue tab at the top would find what I'm suggesting.
Believe me, I have looked high and wide for a replacement head for our ST3000. They just aren't out there. I had two choices: find the repair guy (which I should have bookmarked) OR buy a used DIFFERENT one which I did. It's in a box in the garage right now.
My real goal is a CPT, but that's out of our budget now, so I got the used one for 10% of the price of the CPT. I'll try it out on the boat soon.
I sure hop someone comes up with the repair guy, or you can find it and post it here.