Sheldon Coopers Green Lantern Shirt

It looks as if this shirt was originally sold from TheComicCenter.com but that website now appears to be down. Sorry, guys.

Featured on The Big Bang Theory episodes

S04 E24: "The Roommate Transmogrification"
S05 E04: "The Wiggly Finger Catalyst"
S05 E17: "The Rothman Disintegration"
S05 E21: "The Hawking Excitation"
S06 E07: "The Habitation Configuration"
S06 E12: "The Egg Salad Equivalency"
S06 E19: "The Closet Reconfiguration"
S07 E03: "The Scavenger Vortex"
S07 E12: "The Hesitation Ramification"
S08 E07: "The Misinterpretation Agitation"
S08 E22: "The Graduation Transmission"
S09 E10: "The Earworm Reverberation"
S09 E12: "The Sales Call Sublimation"
S10 E18: "The Escape Hatch Identification"
S10 E24: "The Long Distance Dissonance"
S11 E01: "The Proposal Proposal"
S11 E13: "The Solo Oscillation"
S11, E17: "The Athenaeum Allocation"
S12, E17: "The Conference Valuation"
S12, E23: "The Change Constant"