Here is the letter he sent me
first of all let us thank you for your interest in our high quality grips 100% Made in Germany.
Directly we can support you with our different grips without the SIG Sauer logo. Please have a look to our internet shop at www.nill-shop.com
For the versions with the SIG Sauer logo we would like to ask you to directly contact SIG Sauer as for trademark reasons we are not allowed to market them directly.
SIG SAUER, Inc.
18 Industrial Drive
Exeter, NH 03833