These are available to purchase on my redbubble site - details below!
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Transformers - "Energon"

http://www.redbubble.com/products/configure/7516749-t-shirt
Transformers - "Lubricant"

http://www.redbubble.com/products/configure/7516839-t-shirt
Transformers - "Beryllium"

http://www.redbubble.com/products/configure/7516818-t-shirt
Transformers - "Nucleon"

http://www.redbubble.com/products/configure/7520450-t-shirt