According to speculation on Red Alliance (someone on there had the same idea as you), Real Sword is looking to release a new batch sooner or later... My money is on much later.
http://www.red-alliance.net/forum/index.php?topic=25055.0Your best bet is to lurk on all the major airsoft forums (as well as Tucson Airsoft Coalition) and hope someone puts one up for sale. There's also Airsoft Classifieds on Facebook, but there some sketchiness there. Ebay is another place to lurk on.
Alternatively, you might want to consider CYMA, JG, Echo1, or DBoys AK. I know DBoys makes a couple of full steel models. Would also be much friendlier to the budget.