Information/Question for extracting 3D model from an old mod

[CJagd]

Hi
Decade ago, I played with the X-Tra Ship/Station Pack by Cadius.
(viewtopic.php?t=308762)
I want to extract the 3D files of some ship inspired by the game “Nexus The Jupiter Incident”. They would be used for personal 3D Printed Miniature. I’m unable to access the 3D model by myself.
I’m also not sure about legality, but the ships being already inspired by another game and the mod owner being inactive for years, I think legality shouldn’t be a problem.

Is there someone I can contact, either to offer me information on the extraction procedure, extract the files for me, or contact and obtain the mods owner’s permission if required.
Thank You