Adverse possession of a car?

[Chunkster]

Eight months ago, an acquaintance asked to park his car in my driveway when he moved to the mainland. He told us that he would be coming back to sell it and some things he had in storage in "a couple of months." Well, he has never come back and has now announced that he never will. Turns out that his ex-wife had the title to the car in her name and will neither sign it over nor arrange to have it sold.

The vehicle is worth about $1200, and I wouldn't mind having it as a back-up "beater." Is there any legal way I can get an official title due to abandonment? Thanks in advance for any ideas.