IIRC, there's some mechanism in Steam to pull down old versions of games from their depot servers. I remember reading about that when people were upset about game developers pushing updates that broke games and people were trying to figure out workarounds. I suppose you could download that version and try to get the model out if you're a huge fan of it.
googles
Yeah.
https://techwiser.com/how-to-download-old-versions-of-steam-games/