So, its been a painful couple of days and digging out the answer to this question was so challenging that I thought that I would reply to my original post just to make sure that the info was available to everyone else out there in boxterland.
The tool that performs this particular operation is Porsche tool number 87050. A company called Sir Tools used to make a far cheaper version (part number st9701)for folks like me who might use the thing less frequently. It was not apparently a big seller and it was discontinued. That's the bad news... the good news is that Sir Tools incorporated the terminal wire extractor into a "kit" .. (part number st 9025 and one is now winging its way to Saskatoon and I should be able to get my car back together.
So, thanks to Boyd at Sir Tools (
www.sirtools.com) .. he was really helpful. I've attached a couple of pics so that anyone else will have some visuals and won't have to scale quite the learning curve that I did.
all the best,