Where to get a 904 flexplate

I already have a stock one,but I'm apprehensive that it might not be robust enough for the kind of abuse we have planned for this car. As i understand it, the aftermarket flex plates are stronger (thicker) and hopefully will absorb a lot more torque/horsepower before they come apart, so since we wanted to minimize the chances for a drivetrain failure we thought we needed the heavy-duty part.

Thanks for the heads-up!!!!