You could try this one:
https://www.swanseatimber.co.uk/too...tool-blades/smart-smartlock-adaptor-for-blade
Full disclosure: the adaptor shown is designed for quick release (lever lock) machines. I have a Bosch GOP 30-28, which is Starlock, but screw fixing (non quick release). I bought the adaptor, cut it in half along the weld seam, put a modified button head screw in the middle where the quick release would engage (to attach adaptor to machine) and then welded it back together. The screw supplied with the adaptor is used to attach the OIS blade to the adaptor.
The short version of the above is that I do not know if the hexagonal Starlock part of the above would be compatible with the quick release system on your machine, but likely could be adapted to fit. Note that in the product description, it specifically states it is not for Festool machines, but I take those words as a challenge that can be overcome by application of intellect rather than a prohibition.
Also have a look on the 3D printing sites. It is true that a plastic printed item would not have a long life, but people like JLCPCB and PCBWay offer 3D printing in metal at low cost. The plastic one would serve as a prototype to prove the design works before making it out of a more durable material.