Interestingly enough, the 3 plugs they're offering are the 3 that have the words, "mind", "body", and "spirit" written in Aurebesh around the edges. Unfortunately they're not any of the ones I'd want the most (either a brass V2 round reactor for my ASP hilt or silver regular round cog for a Sith hilt). Still a nice offer though. I'd probably pick the regular reactor of the 3.
I'm debating grabbing an intitiate hilt off the main site with the gift certificates I got from the Memorial Day sale to take advantage of this, or waiting for the ASP coupon Phil said us backers would get (in case it's a timed deal).