Kuzma 4 point that I have has something that can cater your need. Its head-shell is removable with just one nut. You can align your cartridges on their own headshells (mine came with two headshells) and just change them as you wish. Of course you will need to correct the vta, vtf and anti-skating but they are very easy to do on this arm, especially with the vta tower (with the exception of 9") You can mark the correct vta and vtf for lets say two carts and then you can do a fully adjusted cart change under a minute.
Cost no object I’d vote for the Graham Phantom Elite 12” arm. That has a removable titanium arm wand as Bonzo eluded to. That said, I don’t have personal experience with Graham arms or how easy that operation is. Though I’m sure another member will chime in here.