How to make a WordList with WPS Pins

I would like to make a wordlist with all WPS Pins. Some routers have default WPA password same as pin, and a lot of users do let it default.

So I think in use Reaver/Bully's pin-generator to output thoses pins to a file
or
Use crunch 7 7, and add checksum using a script

Someone knows how to make this wordlist?