Car Keypad

I was looking for a cable tie mount, even checked NAPA, but had no luck. Where does one find these? I know I'll want them again in the future.

Also, I've published the board at BatchPCB, so anyone can have one made whenever they want.
http://www.batchpcb.com/product_info.php?products_id=20456&check=c14c074daa0b1640579156fd6d36dd84