Why not consider doing what I used to like to do:- amend (re-write) the contracts so I (and/or my blokes) responded to "1st.Line" jobs ourselves?
It was cheaper that way, and the users were better served. In short, we did the "call-outs" and the service providers (local agents) did the scheduled PM's. It had the additional benefit of ensuring that the biomeds remained engaged with the kit (rather than just forgetting about it because "it's on contract").
All our kit which was on contract ended up like that (lab, x-ray, ultrasound, dialysis and what-have-you).
