Options for Brembo GT replacement rotors?

[betterair]

Has anyone found rotor options (drilled or slotted) for the Brembo GT 1 pc rotors ?
I have searched to no avail,other than brembos drilled 1 pc.replacement rotors.

F/R Specs below:

Brembo GT front rotor GT-1P_.6001A (GT SYSTEMS)|1986 PORSCHE 911S / SC /Carrera

Disc 1P4.6001A2

Disc Type: Cross Drilled
Disc Material/Finish:High Carbon / Corrosion Resistant Plating
Disc Diameter:323mm
Disc Width (Measurement):28mm
Disc Air Gap (Measurement):10mm
Disc Annulus (Measurement):54mm
Disc Construction:1-Piece Disc
Disc Vane Design (Measurement):vented Curved 48 Vane
Disc To Hat Mounting System:N/A


Friction Material
Pad Compound:Brembo High Performance FM1000
Pad Volume / Surface Area:76.4 | 62.1


Rear Brake Rotor/Pad Specs

GT-2C_.5001A (GT SYSTEMS) | 1986 PORSCHE 911S / SC / CARRERA
Disc 2C4.5001A2

Disc Type: Cross Drilled
Disc Material/Finish:High Carbon / Corrosion Resistant Plating
Disc Diameter:309mm
Disc Width (Measurement):28mm
Disc Air Gap (Measurement):13mm
Disc Annulus (Measurement):54mm
Disc Construction:1-Piece Disc
Disc Vane Design (Measurement):Vented Curved 48 Vane
Disc To Hat Mounting System:N/A

Friction Material
Pad Compound:Brembo High Performance FM1000
Pad Volume / Surface Area:48.2 | 53.6

Thanks