here's the cord by musotoku clip.
The Kepler Cord has been designed with comfort and performance in mind.
The Kepler Cord 15 has been specially developed for DK,
but it is compatible with any other machine with a clip cord opening from 15 mm to 8 mm.
Length: 2.1 m (7 ft)
Clip weight: 9 g (0.02 oz)
Bending radius: 15 mm (0.6")
Cable specifications: US military standard MIL-C 17
Magnet: located under the heat-shrink tubing, for easy placement on your metal workstation.