Some tried... ;) There was Jaro Kinnunen who had a good pace, he finished 6th and 4th in 208 cup in 2 gravel events he did in France. There was Taisko Lario who did the whole trophy if I'm not mistaken, his best result was 8th overall. There was SWEDISH Mattias Adielsson, he did a gravel event (Causses - finished 10th in 208 cup) and a tarmac event (retired after crash). Chris Ingram also did some events in the 208 cup, his best result was 5th in the cup (6th in R2) in Limousin (tarmac).
And also on international level, I'm asking myself... Is Jari-Matti Latvala the last flying Finn who will win WRC events? When looking at the future, except for Lappi or a possible miracle for Hänninen it doesn't look so bright...