Sorry for the double post -- but I need you to know it's 100% a real thing. I'm probably one of the biggest Tommy Wiseau fans out there, and yeah. He sells them at his shows (when he does midnight shows of The Room) on his website, and randomly at some properties he owns in San Francisco.
He also sells copies of the script to The Room, jackets, plush dog toys, Tommy Wiseau bobble heads, etc.