In need of a stock E38 ECM tune for the following OS for a truck with 6.0/6.2 with 6l80E.

OS# 12626014
Operating System 12626014
System 12626765
Fuel System 12626741
Speedometer 12626787
Engine Diagnostics 12626725
Engine Operation 12626685

EFI is showing this OS is not supported even though running latest updates.