If you are looking to buy any shrubs, trees, fruit trees etc then try Pierre Emmanual Pougault of l'Ilot-Vert just outside the village of St Leger sous Beuvray.
His quality is excellent and he guarantees anything you buy. He grows everything himself and they therefore will do well in the surrounding area, particularly the difficult conditions in the Morvan (which means they will also certainly do well outside of the Morvan).
His nursery is on the road to Bibracte, on the right-hand side if coming from St Leger and of course the other way if coming from Bribacte. It is signposted.
He is at the nursery every Saturday.