Looks like you might be onto something there, will you also offer to install them and show people how to use them correctly for those of us that know nothing about electronics?
If I produce a kit then I wouldn't recommend it to people with no electronics skills. The idea of producing a kit is to keep the cost down and allow people with some basic electrical and mechanical skills to assemble the units and get inexpensive fast charging. To build a fully complete unit requires a significant increase in cost - defeating one of the main aims of making these chargers - low cost.
In terms of installing them on a Zero - there are other charging options that are IP rated and suitable for installing on the bike - but they also come at 2-4 times the price for the same charge rate. I chose this path because given appropriate handling and use (carried in weatherproof bags/box and not left in the rain when charging), these chargers will be 50-80% cheaper than similar powered chargers (multiple TC, Elcon, Quiqs) with a similar 50-80% reduction in weight and volume.
In terms of how to use them, they are a DC charger with Anderson DC output connectors that utilise Zero's fast charge port. Use of the fast charge ports is covered in the Zero manual.