I can't remember where I found it, or how, but I think it could be on the newer side (2 months?)

The subject speaks for itself. It's a one shot, and I remember Dean was bi, and he finds the Impala gone from the motel parking lot to be replaced with a black man leaning against the building.

The impala fucks Dean in the motel room, and I'm not sure, but I think they meet up with Sam at a diner the following morning.

I remember so much about it! Just not where to find it, so I hope someone can help me out with it.