I really wonder what you mean by "use", and I really wonder how this would benefit to the doll industry.
I mean, game developers aren't 3D sculptors, therefore they wouldn't be able to recreate a model that looks like one of the doll. And even if they were, what would it be, how should it be used ?
Should they have to tell that "the mother is based on the realistic sex doll XYZ, while the big sister is based on ABC" ? What make the success of those dolls is the (relatively) heavy configuration, therefore it would mean nothing in the end. The introduction would looks like, "base X, boobs X, etc. Yeah, I customized it to looks like the character I wanted to create, and anyway you'll probably do the same because as much as you like the model I created, you'll always prefer it with a little more of this, and a little less of that".
Or should they include them in the game as effective sex doll ? But what would be the interest for the player to have a story when he'll be able to have sex with a lot of "virtually real women" and a "virtually realistic sex doll" ? They would never choose the last one, it present no interest because there's no human-like interaction with it.
The only viable option is
Hagatagar 's one. Realistic sex dolls that looks like a character from a successful game. But even there, it would be a really limited market. To few exceptions, what people like in a girl from a game is her personality, or the in-game interactions, more than the way she looks. Take the girlfriend in WMV by example, the model used isn't intended to be "real human looking". Peoples like to fap to her in a game, but I doubt that many would like to have sex with her in real life ; even less with a realistic sex doll looking like her.
In the same time, how many authors would know how to correctly sell their rights ? A company would come, tell them, "Hey, here's US$ 10.000, in exchange give me the right to use the physic of 'this' character in your game, to make a realistic sex doll", and they would happily agree. For them it's a lot of money, but for the market it's a scam.
And finally, it wouldn't really sell. Just look at the porn industry. There's not this many pornstar that have a sex toy or a doll modeled as them. When it happen, it generally sell, but not enough for this to have become a habit. Only the mega successful pornstar have a big enough fan base for this, a fan base than not a single adult game creator, DarkCookie and Adeptus Steve included, are near to equal.
It's just a guess, but a reasonable one, their fan base is probably as big, if not bigger, than the whole adult gaming scene.