How come you're not doing them yourself?

Or perhaps a better bet is to follow the model I adopted at Onaiza:- namely, "we" did first line (responding to calls, minor repairs and establishing whether faults were real or imagined), then called in Philips (at negotiated - preferential - rates) if and when there was a real need.
If I remember rightly, the contract we got them to agree to was one PM-type visit per year and up to three call-outs per major system per year. Something like that. But either way, we made sure that
we remained in the driver's seat, as it were.

By the way, the only bloke I have ever come across who did what I would call "proper" PM on x-ray systems (that is, a full check, plus adjustments ...
and lubrication, cleaning and all the rest) ... taking a couple of days per unit if need be, was (yes, I know you've guessed it already, Neil) Yours Truly!
Otherwise (digging even deeper into the Memory Banks), if heavy-duty fault-finding was needed, we always used to get good results from Hans at Badr Trading. I wonder whether they're still around? Somehow (knowing some of the personalities involved) I doubt it. Then ... even farther back there was my old Mate Ramadan Yanuz of Al-Watad. But I should imagine that Ramadan (the Master) packed it in many moons ago.
Is there any New Kid on the Block out there now? A good third-party x-ray engineering service, that is?