Yeah Norm, there are a lot of cigar lighter and battery clip types out there. And ours came with both (an adapticator thingy)
I'd die trying to inflate the kids towables on the pontoon boat!
Here's some links:
Cabelas offering

Overton's offerings Type in Inflators.
Overton's 12 volt $49.95 offering

For a few. I don't know what mine is, except it's blue, it works good, and they inflate and deflate your air toys. That deflation mode is great for packing stuff away!

I'm sure there are a lot more offerings out there.