Jim,

I built an Escape from a set of cores and bulkheads I scored on the cheap.
I encountered the same problem with my ailerons. No in stock shaped wood was available in the needed size.
My solution was to laminate a set to the needed shape. I used wood glue, sands real nice.
I had to make them twice. If you do not weigh them down flat and let them dry for a couple of days they will WARP!!

Hope this might be a solution for you.

Nice job so far!!!!!

Tony