All my DD plans are gone but here are plans to a delta I sell that flies very similar to a Dust. My avatar is one version of this plane and it can also be built with center vertical fins. See my web site for pictures and videos. I have a few kits, blemish kit, and a really cheap blemish short kit for sale. Shipping to Canada is not cheap with even light packages shipping for a little under USD $20. Feel free to print and use the plans if you don't find your DD plans.
http://www.mikesrc.us/delta2lgls.pdf