Thanks for identifying the samples! Makes sense now that you say it.
The game is 'Pitfall: The Lost Expedition', from the studio 'Edge of Reality'.
All the game assets are stored in .arc containers, which on older releases of their engine had convenient names such as 'models.arc', 'textures.arc' etc, as is the case for Pitfall TLE.
The samples I provided in the first post were extracted from 'characte.arc' file using a BMS script, and I thought they contained model data (as in everything related to models).
Looks like they are split up between several files then.
I have put the archives I think are related to character models into a rar archive, including two BMS scripts to extract them, and
uploaded it to Google Drive. Makes for a more complete picture (Should have done that to begin with).
The "gc" folder contains GameCube files, and the "ps" folder contains Playstation files.