Shielded usb a/b cable

Les C. VA7RN

Does anyone know of a source of a shielded usb a/b cable?  Trying to cut down on rfi. Tried lots of ferrite but I'm still having trouble on 160 when I use the amp. So, I'm hoping someone can point me in the direction of a good a/b usb cable.
Les, VA7RN

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