Mass air sensor only?

The sensor was likely flowed on that particular meter, meaning that you can't swap them.
The reality is that if it's a pro m (I think pro m did the bbk's, don't quote me on that) you could have it redone, for like $100, which is about how much you would spend for a used 24lb meter complete.
So i'm with boosted, sell it and just buy another. May land up costing you zero in the end.