Shown below is a wing kit complete with carbon fiber spars. The kit with aluminum spars is identical in almost all respects.
The wing kit has everything except glue, fabric and paint. In a future post, I'll run through the list of contents in this kit.
With aluminum spars, this kit costs $1430.
With carbon fiber spars (as pictured), this kit costs $3630.
A complete description, with many, many pictures, of how to build a wing from this kit is included in this link.
And here is the photo of the wing kit:
