Thanks, Steve!
In hindsight, a bit of background info might have better explained my situation.
It all started with this thread:
http://986forum.com/forums/performance-technical-chat/71446-diy-big-brake-rotor-upgrade.html. Specifically, see my post no. 16.
Then, as a follow-up, I checked their website this week and found this kit:
https://freakyparts.co.uk/collections/porsche-boxster-987-brakes That's the only Boxster kit which they show, with no mention as to whether or not this 987 kit might also fit our 986's.
So I shot them an e-mail asking this question, and received the following reply (cut and pasted):
Hi Dave
I believe the early 986 uses smaller discs, but if they use the same calipers and hubs as found on the 987 to work with the 318mm front discs, this kit should work.
The shipping costs on the kit would be £80.00
Thanks
Stewart
FreakyParts
Note that USA folks would not have to pay their VAT so that cuts the cost of the kit. But since we are looking at over $100.00 USD for shipping, the cost and hassle of returning the rotors, should they not correctly fit a 986, would be a relatively expensive hassle.
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And so, there's the reason why I am calling the question here!
Thanks - DM