Hi Soundog, I am indeed stuck having exhausted all options in the UK. I would be very appreciative to take up your offer if it still stands, and can pay you up front via paypal if that works?
Here is the note from Fullcompass on how to order, as the part is not visible on the website.
Hello,
Part# 50-00-0159 is the model selector pot for Variax 700. $14.65. To place an order please call 800-356-5844 and have the appropriate part#(s) on hand.