There are several options for batwing fairings for a dyna. One of the better fairings are also a forum sponsor Dead Center Fairings: https://www.deadcentercycles.com/products.php

There is also Reckless Fairings:
http://www.recklessmotorcycles.com/

and Tsukayu Fairings:
http://www.tsukayu.com/

There are a few other companies as well including USA Trailer Store on Ebay.

I've painted and installed fairings from most of those companies, and most any fairing for a touring bike will work on your Dyna(with a 7' headlight) if you can fabricate the brackets yourself. I've used a Dyna fairing(small headlight) from Tsukayu on my 07 Sb with a 7" light and it fit snug, but it fit.

If you have mounting clamps for a W/S you can fabricate the brackets to install one from USA Trailer Store pretty cheap. I recently bought a fairing for a customer for $176.0 and I've seen them sell for as low as $134.00 . You just have to keep watch on the Ebay auctions and catch one at the right time.
http://stores.ebay.com/The-USA-Trail...=p4634.c0.m322

I've bought a few from them(USA Trailer Store) and they are all made the same except for the brackets that come with them and the speaker hole sizes. So you could get one made for a Yamaha(or Suzuki,Honda etc), make your own bracket and install it on Harley or whatever. They don't come with speakers or wiring but they do include windshields.

The Dead Center Fairings appear to be top quality and better looking than the others.

The Tsukayu may be the best deal for a complete ready to bolt on with radio and speakers, paint(Vivid black) and mounting clamps and brackets.

Reckless makes a decent fairing but does not include the fork clamps. I wasn't impressed with there service either.