2006 GT with Roush 2.3 TVS supercharger

[palliserponies]

Local shops aren't able to help.Can someone with first hand knowledge tell me if Gates belts make a 6 rib replacement serpentine for a Roush R07020062-13-AA and what the part number is.The belt diameter is around 133 inches.My setup has 12 pulleys. The automotive shop says that they don't make that size.