[Request] Porsche 991 GT3 Cup Spare Parts Catalog

Hi, i hope the Porsche specialist here on AP con put me in the right direction.
Anyone know where i can find the spare parts catalog for the Porsche 991 GT3 cup?
I have check on the PET without success, because i think are motorsport parts not listed under the normal GT3.
I'm especially interested in the exhaust part's.

Best Regard, Davide.