It is kind of an experiment. Linux executables from 3.40 version, with headers and libraries from 3.46 version. It is working ok, with the advantage that the file names are adapted for linux (lower case letters). It works best with the last legacy MLA library for linux.
If you want to try, you can find my backup here but you are on your own. You have to save your original compiler first, then unarchive mine in the /opt/microchip/mplabc18 folder. Obviously, when working with MLA Library and Examples, any MPLAB 8 project have to be imported into MPLAB X IDE.