My backpack has lash points. I want to put in a lashing system on my backpack like the one in the picture below, but I can't find the hardware -- well, mainly

(1) that adjusting thing in the middle that can accept two cords; and
(2) some way to terminate the cords.

[img]http://demandware.edgesuite.net/sits_pod..._web.jpg?sw=472[/img]

Any ideas, guys? Thanks for the help!