I sold my Boss 5 two weeks ago and bought a Bridgeport Torq Cut 22 to replace it... The new machine has almost the same work capacity but has servos, tool changer and full enclosure. The boss took up a little corner of the shop while the new machine takes up 5 times the space... But I needed the TC and enclosure so I'll live with it.
The good news is I sold it to a friend up in Bryan Texas and it is still available for you to look at if needed. I sold the machine with the computer and software but less the control cabinet I built for it. I need that cabinet for my MechMate router table and it had far more functions than needed for the boss. My friend is making a new control box for it using the same parts in mine so he would have a line and list on all the parts you would need.
Frankly there is not a lot needed. A case, 3 drivers, a power supply and a BOB card.. LIke ShortBus says, it really can fit in a large shoe box
If you
go to this site ( Mechmate.com) you will find a forum post where I show how my control box was built. that is the build thread for my Mechmate and the control box pictures start on the bottom of that page...