Waterman (Division of Sanford, Parker, Waterman, Rotring) still has convertors for the Waterman CF in stock. I just called and have one on the way...
$16.50 with shipping... not as cheap as most converters, but when you consider it is brand new for a pen this old, I am very happy
The customer service number is 800-523-2486

Thanks for posting that info Tom... I am sure that will come in handy for a few folks here!

Hi Tom,

This is great news! Can you spare some details about the converter? Is it a squeeze type or piston type? Does it hold as much ink as the original CF ink converter? Do you find it to be of Waterman standard quality? And lastly, are these the ones being referred to as Waterman Lady Converters?

Here's a related link I had found:
http://www.pendemonium.com/ink_waterman.htm

I've also learned that Pelikan has an international converter that can work, but that's unconfirmed.