Star Wars & Marvel Comics Reversible Belts reduced from £5 to £2 @ George at Asda.
These belts are reversible and fit up to 45". They are plain black on one side and have the old style star wars images or marvel comic characters images along the length of the other side. I only purchased the Star Wars belt so I can't tell you for definite which Marvel characters but I am guessing the same as the Wallet so it should be Captain America, Spiderman and the Hulk.
I bought these from the George in the Walton Asda, Liverpool but I have also seen them in the Aintree, Bootle & Sefton Park Asda at the same price. Should be available nationally.