A quick search found this in a few seconds:
Note there are a lot of tools, including a number of offset, slotted hex drivers for the BNC back-nuts, etc - kind of equivalent to a crow-foot socket, but nicer, low profile for getting in close-quarters behind the panel. Didn't see any of these nut driver style ones for holding the front though. I'm still convinced these were commercial products. Tek could have made them in-house, but I doubt they needed to. Even way back, there must have been plenty of demand for various BNC tools, and someone to fill it. Every connector type has special tools to go with it.
Ed
