Thanks to Lorenzo de la Fuente two more recolor variants are available on the Mechwarrior Paper Models page.

A Free Worlds League Militia Hunchback and a Kell Hounds Hunchback.

He also noticed that some of the mechwarrior3.org models were missing from the repository. These have been added (you can search on mechwarrior3.org to find them).

Edit 2021-04-13:

Lorenzo also sent over 2 Spider kitbashes for the 6th Arkab Legion and the 4th Free Worlds Guards.

Also the MW3 Locust model with 8 textures has been posted.