I designed this model because I didn't find a clamp that holds both the vacuum hose and the power-cord.

As a template, to draw around  the profile I used the MTF rail profile download on grabcad.com from Ian McFetridge.

You can use the STEP file to make other holders based on the rail profile.

By the way the PETG green filament #30501 is very close to the green Festool colour.