The kits, for all practical purposes, are gone.
If you can find a kit you like (try RC Universe classifieds or E-Bay) get it. If not, buy a set of plans for the bird you want and either cut the parts yourself, or have a "kitcutter" laser cut them for you. The LaserLizard (
http://www.laserlizard.com/ ) has a very good reputation for quality work, ontime deliveries and at a fair (or lower) price. I am certain that others can recommend the LaserLizard also if you decide to go that route.