Porting Schematic from one voltage domain to other

Hi All,

I wanted to port a LevelShifter ckt which has VDD, VDD150, and VSS as the PG PORTS to VDD, VDD180, and VSS.  The fets used in 1.5V domain is of a different flavor when compared to the fets in 1.8V domain. I want to write a script for this task as I want to run this on an entire library. (Level Shifter is just an example here, the circuit may contain different components like resistors and capacitors also but we only need to change the fets as of now).

Please let me know a way how to do this using SKILL.

Thanks

Utkarsh