Just browsing Forbidden Planet (for a change) and spotted they had a fair few T shirts at just £2.99, or you can have them delivered for just a quid.
Hit 'Get Deal' then slect 'Clothing / T shirts / Low to High) Ones available are:-
Lenore: T-Shirts: Coffin
Lenore: T-Shirts: Monkey Magnet (Skinny Fit)
Lenore: T-Shirts: Nurse Lenore (Skinny Fit)
Lenore: T-Shirts: Lenore And Friends
Teenage Mutant Ninja Turtles: T-Shirt: Kraang
Doctor Who: T-Shirts: My Boyfriend's A Time Lord (Skinny...
Marvel: T-Shirt: Fantastic Four Logo (Skinny Fit)
Nosferatu University: T-Shirt
Kick-Ass: T-Shirt: Squares
Wolverine: T-shirt: I'm The Best ...
There's also some rather cool ones at £4.99 too like
Hammer Horror Dracula