I took a quick look and don't see any way to contact them either. Even their whois information is hidden.
Administrative Contact:
Whois Privacy Protection Service, Inc.
Whois Agent (ydrfnhnxtm@whoisprivacyprotect.com)
+1.4252740657
Fax: +1.4259744730
PMB 368, 14150 NE 20th St - F1
C/O Konzeptz.net
Bellevue, WA 98007
US
the URL:
http://konzeptz.net/support/open.php?topicId=2(http://konzeptz.net/support/open.php?topicId=2)
let me open a ticket. (using a horribly fake email)
the URL:
http://www.konzeptz.net/mail/home/signup.php(http://www.konzeptz.net/mail/home/signup.php)
looks like you can use it to sign up for an account with them, maybe it would let you get a contact email address?
Good luck.