Red wolf has one, I didnt bother to look at the price as I believe that you should do some of the work yourself. However, I doubt it will be cheap. Most likely it will cost more than the aeg.
http://www.redwolfairsoft.com/redwol...ail?newsID=725
Be wary of what company mags whatever mag you end up getting. There are some manufactuers out there that put out some real nice pieces of shit. I could look more for you, but honestly I dont feel like it.