C4 13" Brake Rotor Question

[Serpa69]

Does anyone know a part number or sell a front disk that is thicker than the factory. I did a C5 caliper and a C4 13 inch disk setup on my 69 camaro. The setup I used the SpeedTech offset brackets. The car stops great and works I just do not like how far the pistons have to come out of the calipers. I know a C5 corvette has a thicker disk but I need the offset for the clearance. Any suggestions???