Aircraft Spruce has a product listing for the Approach Sport Hub
Avionics Wiring Systems

http://www.aircraftspruce.com/catalo.../approach1.php

The Pro Hub for IFR is $600 and the cables aren't cheap, but it seems
like once this is installed, avionics additions/upgrades could be done
fairly easily???

Would someone considering an avionics stack upgrade be wise to consider
installing something like this as a hub for the entire stack?
Especially if there was a constraint to upgrade a little at a time?

Thanks!
Todd