Looking for light weight stock 986 seats

[Rotmilky]

I'm building up a 2001 S for stock autocross racing. I'm thinking of swapping out the seats that are in there for something lighter. The ones I have are electrical adjust tilt with a mechanical adjust slider. As I understand, they weight something like 50 lbs each.

Since it's a 'stock' class, the replacement seats have to be something originally available for the 986. So no GT3 seats nor aftermarket racing seats. Were there any lighter stock seats? I'm thinking possibly some kind of seats might be available without the electric motors.