Rega RB300 wire/cable upgrade

As so often, I'm hoping some Audiogoners will be up on what's available in the USA by way of internal and external wiring upgrades for a Rega RB300 arm. I'm hoping to sell the Rega 3 with this arm, but once detached an internal wire and that makes it hard to sell, so I thought I'd look into a wiring upgrade to make it more saleable.

I thought Express Machining used to offer a rewire kit, but all I can find so far is outfits in England and Australia who do this. Is there no US source for such a kit?

Thanks in advance for any who respond.

Tom Patton