I found this site: Modding the Aquarius, though I have to say things over there are a bit expensive, though given it wasn't a popular machine I suppose that prices are high due to low volumes.
However, I did also look at the section on the composite mod DIY edition and as a result have ordered the PCB from PCBWay
The minimum order is 5 PCBs, and since I need only the one, I will likely have 4 spares, so if there is anybody who is interested in a PCB to convert their own Aquarius to composite is well, just PM me and it will be first come first served, all for the low low price of free.
Be aware they may not be here for a little while as I only ordered them this morning.


