Wasted spark coils are as common as muck these days. Ford have been using them on Mondeo and Focus models for at least 20 years. The "coil pack" has 2 separate primary windings and 4 secondary windings (for 4 cylinder motors)
I would be surprised if other mass market car makers have not followed suit, and I have a feeling that they are even more common on motorcycles.
and ... technically speaking the Briggs and Stratton single cylinder motor on my lawnmower has a wasted spark. The cam for the contact breaker is direct on the crankshaft - even though its a 4 stroke motor.
Also, using 2 distributors to fire 2 plugs per cylinder is not confined to planes - in the distant past both Alfa Romeo and Aston Martin have fitted systems on road cars. Ferrari have also had a crack at it, but I am not sure if the vehicles involved could be called road cars.
Long story short ... if you look in the local scrapyard you should be able to find plenty of material to experiment with.
Have fun ...
AT