Most actual "scratch builders" would be past that question and have a subject in mind that a kit is not available for.....I think you probably meant a "kit build" as in laser cut balsa that requires ALL assembly and covering. yes?

Have you heard of MountainModels.com
These are some of the nicest kits I have ever assembled. I would recomend the following for slow flying and light sport manuovers.
Dandy Sport, Switchback Sport. Both have the ability to be 'upgraded' to a more aerobatic wing if you should want to progress your flying.