There is, albeit hardly cheap. In something like an Obutto R3evolution cockpit, you can purchase duplicates of the side mounting panels and easily swap them out, so I have a couple of Virpil sticks hard mounted to one, and another VKB stick that I don't use to often on another, a VKB throttle on another and a custom build throttle/control box on yet another. With space for at least 3 mounts on each side and one central, I can swap them as well as move from left side to center or right mount really pretty quickly - maybe 30 seconds per unit. They're locked in with big hand bolts so no tools required, and rock solid as a result. I also convert to a racing sim setup sometimes so I have another couple for gear-shifter and handbrake. I just ordered another one for this Virpil collective controller, for my sins.
I know - not cheap, given they're 40-50 bucks each, US, but they're either pre-drilled to fit Virpil/VKB (among others) or easy enough to drill to fit, as a one-time DIY tweak. It does at least fit the 'easy/fast' part. I would guess if you build your own, it would be possible to accommodate a similar concept. It may not be the best (or cheapest) cockpit in the world, but it is rock steady and the modularity is nice. Just FYI, in case useful. If your significant other reads this and does the math on costs, you're on your own.