I think I have some nos ones. I'll check.

There's a bunch of them on eBay . . . but they are all in England.

I'll check tomorrow, they are in the shed.

Thanks for the reply guys. I used the plugs I wasn't suppose to use (no one told me). So I have to replace them.

My boxes look just like that, I just have to see the # stamped on them.
I sent them with the engine builder for my 1776, but he didn't use them.
I got them out of a bus I bought once, still sealed.  I THINK I have 6 of them.
Let me check the # and get back to you. I'll PM you my Cell #. KC

CIP1.com has Bosch WR8AC plugs on sale for $8.46 for a set of 4 (with free shipping if you spend $99).  On the description they state

Bosch has recently discontinued the original W8AC Super spark plugs and had superseded them to the new Super Plus plugs. These are a better plug design and will last longer. They look the same and will replace the old plugs perfectly.

Since they don't state it in the add and you can't see it on the picture of the plug or the box, my guess would be they are not made in Germany. 

I found them in England. It was cheaper to buy and ship them from overseas than buy from other people on thesamba.