DDupleks is planning on bringing a new slug for the US market. The Kaviar fragenting slug is designed to break apart. It is being marketed as a home defense round and does not over penetrate.
I see its potential for shooting action matches safely when shooting steel. Steel Challenge with these would be interesting to see. The Ddupleks rep said they have tested these on steel as close as 3 yards. However they recommend at least 7 yards for safety.
No determination on price but they are looking to bring them in packaged in 15rd boxes.