Why hasn't the fossil fuel industry created a pro-skeptic climate model?

According to the denialists, the existing climate models can conclude whatever the designers want them to conclude: a fine tuning here and there, and presto, dangerous warming in the future, but only because the modeller wanted that conclusion.

So my question: why haven't skeptics produced computer models that support their own conclusion, models showing that increasing CO2 and other greenhouse gases will have minimal effects? It certainly isn't beyond their financial capability to do it, even as a confidential exercise they could try first before unveiling it to the world.

One possible reason is that every coal and oil corporation in the world realizes they could do this, but they understand that computer climate modeling is not good science, and they are simply too ethical to do something like that.

I was going to go on and speculate about other reasons for the lack of skeptic models, but I think the one I just mentioned is really makes a great deal of sense and must be the reason.