Outsourced Support for Wordpress Multisite (36 sites)

Can anyone recommend a support company that could provide long term support, questions and requests for updates to a wordpress multi-site containing 36 or so sites?

Common requests would include:
helping people get logged in,
template tweaks (only 2-4 templates total)
plugin support,
general "how do i do x" type questions,
etc...

It's common to receive 5-15 email a day from administrators of these sub sites.

Thanks!