Sheldon Coopers 'Kryptonian Translator' Shirt

This is one slippery sucker to keep your hands on. At one moment its available at ThinkGeeek.com, then it's not. You find it at TheComicCenter.com, then TheComicCenter.com up and vanishes without a trace. Heck, there was even a point when it could be found on Amazon. Well, not anymore. At the moment, it doesn't seem to exist anywhere. Sheldon actually wears several different colored versions of this same shirt in different episodes of the series. If anyone can clue me into where it's available, I'll be sure to update this. Until then...

Featured on The Big Bang Theory episodes

S05 E23: "The Launch Acceleration"
S06 E01: "The Date Night Variable"
S06 E22: "The Proton Resurgence"
S07 E15: "The Locomotive Manipulation"
S08 E02: "The Junior Professor Solution"
S08 E10: "The Champagne Reflection"
S08 E14: "The Troll Manifestation"
S09 E05: "The Perspiration Implementation"
S09 E11: "The Opening Night Excitation"
S09 E17: "The Celebration Experimentation"
S11 E08: "The Tesla Recoil"
S11 E12: "The Matrimonial Metric"
Season 11, Episode 16: "The Neonatal Nomenclature"
Season 11, Episode 23: "The Sibling Realignment"
Season 12, Episode 03: "The Procreation Calculation"
Season 12, Episode 21: "The Plagiarism Schism"