Simply pick a design of your liking, push the "Go to Redbubble" button and you will be taken directly to my Redbubble Store, in which you can then select from different shirt styles as well as jumper styles, select your colour and size and order. Some are also available as some stickers.
Whomobile T-Shirt based on the Whomobile Mod that Swinks designed a few years ago - White Print on coloured shirt / jumper