Wyman,
Most, if not all of the 1/350 kits have multiple aftermarket kits for them in one way or another, be it aircraft, railings, antennas, or whatever you'd need to modify it. The best thing to do is to find a kit subject that you are interested in, such as the Arizona, Hornet, or soon to be released Nimitz, and look at Gold Medal Models or Tom's Modelworks for available update kits. They are 2 of the best in the business. As far as actual numbers go, the Trumpeter Hornet probable has the most aftermarket accy's, due to it's popularity right now.
demono69