Porsche 964 late model rhd pedal box changes

[nrg250]

Hi, I have noticed that almost all 1989-1992 manual rhd 964's have the "early"pedal box layout with a footrest between the brake and clutch pedals..and that all the 1993 cars (that I have seen) have the later pedal box with the footrest to the left of the clutch pedal. This was then carried over into the 993.

Can anyone tell me when (by year or chassis number) Porsche made this change?
(It only applies to RHD cars)

Thanks

Nick