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.
I mean, I think it's cool, but it does look a little off with the rest of her ensemble. Stylistically, maybe they wanted to go with something different?