VAC in Philly PA can build BMW race or street motors to your spec and Top End Performance in California is another one. Expect to pay $5K -$10K depending on options.
I agree with you there but when you look at the back side picture of both seats, they are very different. Now I have never seen a true turbo in person so I cannot say if there was a difference.
What happened to the right seat? Your statement above only specifies the left seat and rear seats as 2002 Turbo. Is the right seat non turbo made to replicate one?