They use the 14-pin sync bus according to this rundown. Visual Cortex and Cadet I both have sync connectors for this, you will just need to buy or make a 14 pin ribbon cable to connect them to your sync generator. They also use 0-1V signals for patch connections as attested by the description of the Voltage Interface I module. I’ve seen a lot of pictures of other people’s rigs that have a mix of old and new modules. The Analogue Haven page for LZX has some specs for some of the Visionary modules. Be aware that these tend to be deeper than Expedition series modules, I’ve seen some folks here using standoffs to get them to fit in a Vessel or other shallower cases.
Note: I, unlike many forum members, do not have any Visionary series modules. Maybe you can get him to sell them to me instead? 