Here is the letter he sent me
Hello Michael,
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.
U.S. Headquarters
SIG SAUER, Inc.
18 Industrial Drive
Exeter, NH 03833
Phone: 603-772-2302
Fax: 603-772-9082
http://www.sigsauer.com