Ty,
I do not know anything about additional canopies. But, that could explain how 2 of the short kits were completed and shipped. I suppose it's possible that the remaining canopies were lost or damaged.
Several of those initially interested in the kit have become disinterested, others grow impatient and are about to move on to other projects. I hope canopies, new or old, are found soon.
Happy Holidays,
Thomas