Sheldon's Wesley Crushers Shirt
The shirt in the above screenshot was made specifically for The Big Bang Theory. Typically that means it would be difficult to find a supplier for the shirt, but luckily one smart company started selling them on Amazon.
If you are wondering the meaning behind the shirt; in the episode where it is revealed, Sheldon was playing Wil Wheaton in bowling. Wil Wheaton played himself (superb actor who starred in the critically acclaimed TV series, Star Trek The Next Generation). In TNG his character’s name was Wesley Crusher; get it?$29.99 @ amazon →