Over at http://www.texascombat.com there are several articles on how to build I/C "warbirds". You could take alot of those techniques and apply them to your slopers.

I usually import 3-views into TurboCAD and scale to the size I want then print them out, tack them to a slab of foam and cut out with a band saw. Then I shape the foam with a stanley SureForm tool, then medium then fine sandpaper.

Another couple of good sources is www.jkaerotech.com and www.georgiacombat.com. There are alot of ways of doing it, just need to pick out the techniques that work for you...

Here is a good thread on using TurboCAD http://www.rccombat.com/forum/topic.asp?TOPIC_ID=10357