@Steve A - Yes it's on its way to my doorstep. Had to use UK eBay's Global shipping program to have it shipped to me in USA, that meant paying import and custom fees etc. No matter, the Total bill came to approx $615 which I consider to be reasonable considering Lotusbit.com sells used ones for £450 (if they can find them) or new ones built in SS for some £1250.
The UK eBay seller (David Wells) I purchased the wishbone from was very helpful, and we exchanged several messages before I completed the purchase. His business is located just a few miles from the Lotus factory and employs two former Lotus staff members. His primary business is restoring Jaguars for affluent 'old farts' UK collectors wanting to re-live their childhood dreams, though he also stocks salvaged Lotus parts. He actually owns a restored blue M100 as well. While he does not focus heavily on Lotus components, he noted that they are typically sold to hobby enthusiasts and track drivers.
I feel lucky.

As an aside, for USA located people dealing with UK-based car facilities, the following could be helpful.... At first my dealing with the eBay UK seller I had to get beyond the UK's terminology for referring to the passenger side of a car. Here in USA for LHD cars we refer to the passenger side as R (Right), and for the rear of the passenger side as RR (Right Rear). It appears that this terminology is different for UK as they refer to the passenger side as "off side" or simply "O". So for a UK RHD car the rear of the passenger side would be OR (Offside Rear). This aspect lead me to see that in my case the UK eBay seller was listing the M100 wishbone for a LHD M100 driver's side rear and not for the LHD M100 passenger side rear. After a short msg exchange with the eBay UK seller I was able to negotiate the correct wishbone description I was needing which happily for me he did have. The eBay UK seller then changed the eBay listing to reflect the proper terminology for USA buyers and then I was able to confirm that the wishbone was the correct one I was wanting, and could with confidence proceed with clicking the 'buy' button.
