Best USB cable option I know of is: Tripp Lite USB 2.0 Hi-Speed A/B Cable with Ferrite Chokes (M/M) --- it's available in 3 and 6 ft. lengths --- a cable w/ full braided metal sheath is as good I think, but I don't know of any reliable part numbers / descriptors.
The Tripp Lite is quite affordable from Amazon, but is an add-on item.
The power supply cord is a standard item as well. The power end is described at: http://docs.carbide3d.com/article/161-will-shapeoko-work-with-220-volts
standard C13 cord with a NEMA 5-20 plug
This should be a compatible power supply w/ cord at the other end:
I think that's for a Nomad, but the extra capacity won't hurt --- if someone knows of an exact replacement for a Shapeoko I'd be glad of it.