I wonder if there's some deranged market for working 2600 guts in an ITX pizza-box or similar. Rackmount with a pull-out LCD? (Scavenged from a PSOne unit or similar?)
With some carefully hidden storage for controllers behind/beneath the cartridge slot routed to a drive bay (Old Sega control pads, something like that...), I imagine one or two people would be nuts enough to sneak one into their server farm. You might be able to work in some sort of storage drawer for a few carts.

Especially if it has a product name that could be hidden on company requisition sheets... "Retrosystems AR-2600-03?"
Then again, I'm nuts. Congratulations on the attention!