the XS sights post had me googling around and I emailed Novak

They are selling "tritium night sights" only for LC9 and sent me this email,

http://www.novaksights.com/products/...l#descriptions

It is $146.90 for the set (front and rear). If you are looking to buy individually the front is $54.95 and the rear is $91.95 plus $8.00 shipping. You can call in your order or give us your info via email and we can process your order that way. If you have anymore questions, please feel free to let us know.

Thanks,

(Contact information on the linked web site)