Alfred
You can get them from here
https://www.christian-schmidt.com/
I bought both volumes of Ken's Men without any problems.
When buying books from USA, we in Sweden always have to pay 25% added VAT plus an additional "forward fee" for the customs agent (read the forwarder who happens to get the package)
Small items readily slip through, but these books ain't small. So for me, buying them via Germany actually saves me a couple of bucks.
Cheers
Stig