you might consider "training" the trees by carefully removing undesired branches and prune to encourage side branches at the particular place you want new branches to start. if there is no suitable branch there already,cut just above an outward facing leafbud (just like roses)and new growth should start from that point which you can (hopefully) train to the desired shape. good luck. ( if you have the money, you might also consider hiring a professional arborist to do some "artistic pruning" to (again hopefuly) re-establish the basic shape of the tree in a way you are looking for).