I'm slowly shopping a XENON head and one of the hacks from a previous owner was to replace the head locking mechanism with a bracket that you have to unscrew to access the head. Obviously this sucks, but all the parts are missing from the lock mechanism. I have detailed pictures of the parts from another collector in the UK, but looking through the Bally parts manual and browsing through Marco hasn't gotten me very far in locating parts numbers or figuring out if this is even something I can fix or find parts for. Anyone have any advice on tracking these down? The parts manual doesn't look like it shows a mechanism to lock the head.