I read that also and contacted them recently and this is what they said..
"We will be offering Bilstein shocks with out suspension kits in the near future. Once available, they will be added to the website. Please call the sales office if you have any other questions. Thank you for your interest in the CALMINI Nissan line. Awaiting your call."

So I think I'll contact them and see what's the price difference is gonna be or should I order them somewhere that has them cheaper..