It seems that delock sells what the reform needs to usb power it but I haven’t tried these out myself yet. The website lists where to buy it by country:
- Delock Produkte 87978 Delock Notebook Ladekabel USB Type-C™ Stecker zu 5,5 x 2,5 mm Stecker
- Delock Produkte 60011 Delock Adapter für Notebook Ladekabel USB Type-C™ Buchse zu 5,5 x 2,5 mm Stecker 90° gewinkelt
And I found this one: