Can any router head be fixed to this unit then?

Depending on your mechanical abilities you could fit any head to the x-axis. There are various mounting holes to fix whatever you need to the head, but you would have to design and build a custom head to fit. You could run it with the small router to see how you get on first.

Does it have the suction bed that hold the sheets down?

I made a metal frame to hold the sacrificial MDF bed this could easily be converted to a vacuum bed (about a days work). And the router does come with a 3 phase vacuum pump which I have personally never used, but should provide the air flow to hold your parts down. At the moment I use drywall screw to hold down the sheets, and add tabs to hold the parts in place, then its just a case of sanding of the tabs off with a belt sander.

If you are looking for someone to manufacture your stages, the router is available to hire. This includes all tooling, electricity and labour costs @ £25/hour

Cheers

Gav