Hi -
So far as I know there have been two commercial kits representing the Alabama. Revell made a plastic kit back in the early sixties. One of the biggest kits of the time, it was outwardly impressive (I practically swooned over the one I got for my twelfth birthday), with a length of about three feet and the then astronomical price of $12.00. In terms of accuracy it was pretty awful. It was, in fact, a modification of the U.S.S. Kearsarge kit Revell had released a year or so earlier. It's been reissued several times, but so far as I know is currently out of production.
The only other kit I know of is a plank-on-frame wood one from one of the European manufacturers; I don't remember the company's name, but the kit is available from ModelExpo (<modelexpoonline.com>). I haven't laid eyes on this kit, but serious scale ship modelers have big reservations about those manufacturers. Their products tend to look nice from a distance, but generally are of highly dubious historical accuracy and made of questionable materials.
I wish I could be more helpful, but those are the only two Alabama kits I've heard of.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.