You could feel around in the bottomweights fabrics. The twill, rodeo and sportswear fabrics are quite a bit heavier than your cotton quilting fabrics but lighter than the denims. But, if you have a black cotton you like, I agree with just adding interfacing.

The Kona Premium Jet Black cotton from Amazon/Fabrics.com is pretty sturdy. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1