Do you sell the backing boards for the books? If so what sizes and colors do you have available? I am looking for a source for an art project. I'm looking for black (or any color but white) with a high gloss finish on one side.

Try Amazon they only have the white ones

They do sell backing boards, different sizes due to the fact that there are different sizes of comic books and magazines. However the only ones ive seen are basic white backing boards. You may want to visit the store as the staff is very polite and helpful. if they dont have something you may be able to use They may be able to point you in another direction.

The only ones I have seen there was your basic white ones.