The C&K switches Benta has linked to may or may not be able to provide what you are looking for. But you will probably struggle to buy the right custom configurations in small quantities. Such interlocked/ganged switches are very uncommon as off-the-shelf parts.
This is where you're completely wrong. The F-Series can be configured by yourself in single-unit quantities. Thus my "Lego" remark.
Example:
I want an array with one push-on/push-off switch, two mutually exclusive switches and three mutually exclusive switches (aka "radio buttons").
So, I order a mount rail for 6 switches, one push-on/push-off switch and five momentary switches.
Add to that a two-position and a three position release rail and two springs for those.
Lastly, six buttons according to taste/style.
Building the switch array is easy. Lego, like I said.