Try National balsa. Maybe they do the kit you want, or can scan your plans for you. I ordered a Ziroli Stuka and got it in a week. The wood is almost perfect for every application as well. I was very impressed, and I am a professional woodworker who machines parts daily.
Being that they sell balsa, They would seem to have a good selection to choose from for the cut parts. All parts were shipped still in the sheets for protection. Avoid PCK. They are terrible.