I believe there are variants of the Super Emeraude which were certified aircraft. This is an easy starting point for the LAA to create a list from. My own permit aircraft has certified variants - but it i significantly heavier and much less reactive / twitchy than my old Emeraude. Touring in my Emeraude I recall being pretty tired after 3 to 5 hours flying a day - simply because the Emeraude is a brilliantly responsive aircraft - which will not fly straight and level without some 'damping' from the pilot. As for flying one within IFR tolerances - Skygod territory! There seems little point in spending money on equipment etc if it is effectively unusable.