We already supply a solder type D15 plug with our Works and Original kits for you to make your own wiring loom, which we admit is easiest done out on the workbench.
In addition to our crimp pin type plugs, you can now buy a screw terminal D15 plug to make the wiring loom that comes complete with a backshell and thumbscrews.
If you're an all-thumbs kind of person this might be just the thing you're looking for! We even made an instruction sheet
for you as well.