B-Monster,
As you probably already know, the Falcon 56 kit has been discontinued for many years now. Also, the entire Carl Goldberg line was purchased by Great Planes (a.k.a. Tower Hobbies) a couple of years ago. I don't know if Great Planes is considering resurrecting the Falcon (it wasn't a big seller during the last years it was available) but it looks like SOME support for the Falcon might still be available from GP:
http://www.carlgoldbergproducts.com/...ga0050.html#01
Since the wing is a major component of the kit, and you mentioned that you'll likely need additional parts in the future, it might be to your benefit to look for a complete kit on RCU or eBay; they show up occasionally. Of course, you might also consider scratchbuilding your wing from the kit plans.
Good Luck!