Rockets Magazine has teamed with Eves Graphics and space artist Tim Gagnon to provide commemorative T-shirts and mission patches, respectively. For a $50 donation you can pick between one of three shirt designs or the mission patch. Full sized images of the shirts and the signed patch can be found on their donation page.
You can find more about this record breaking rocket on official project page or right here in the Dungeon.
You can find out more on Tim G.'s work on Rockets Mag's page or the additional links at the bottom of that page.