MBK 1-Skewer Delta
Any other materials you don't have are easily bought from local shops. If not exactly what I used, then at least something pretty similar!
The pictures should make things pretty clear. Just quickly work your way through from top to bottom, skimming over any detail that you don't need.
The MBK 1-Skewer Delta kite is quite small at 1.0SL (29cm, 11 1/2") in length, but copies the full-size Deltas with a floating spreader and triangular keel.
The little skewer kite flies best with several skewer-lengths of tail.
A tiny bit of extra plastic taped to one wing-tip can correct a turning tendency, but this might not be necessary.
If a 20 pound Dacron line sags too much, you could try polyester sewing thread instead. That should get the kite up to 300 feet :-)
The template shown above represents one side of the kite sail. You
will now transfer these measurements to the sail plastic.