looking for 1pc 13" x .81 rotor

[Bad94]

need similar offset as lt1 camaro rear rotor.
only thing ive found is a baer 2 pc. i dont really want 2pc or drilled. slotted is ok.

trying to find a budget upgrade for LT1 rear setup

[Twin_Turbo]

This guy has thos size rotors, I'm not 100% sure what they are but they look like 1pc baer rotors

http://flynbye.com/catalog/i12.html

What application would come originally with that size rotor? Looks like a C5 piece.

Anyone know what those came OEM on??? I want to convert my rears to 13", have 12"on another car, could use bigger.