it may be that a 95mm boot with the forefoot width increased will be a better piton than a 98mm last…remember not all 98mm lasts are created equal so finding the closest fit around the ankle is really important.
there are always liner options that can help take up volume in that area BUT the closer the shell shape to the ankle the better… zip fit and PU foam are probably the best for taking up volume around the ankle and that is where the fitter comes in, selecting the most appropriate shell then either doing modifications to that shell, the stock liner or an aftermarket liner. it is always possible to add padding to a liner BUT this is not what i would say is a permanent solution, more a make do if the liner has packed out after a load of skiing and you need a little more hold, there are times when it is the solution but without seeing the foot no fitter can tell you precisely whether it is the right thing to do…. problem solving is what boot fitters do best.
i do not sell the fisher boot, the people who do sell it will be along soon to give you the pros/cons of that system, personally the people i have seen wearing it have had wider feet or strange shapes…it is a tool and in the hands of a good fitter can work for a lot of people, it is however NOT a replacement for the fitter and in the wrong hands can be as bad as any boot badly fitted.
you have two recommended fitters, check the list on the who's who at the top of the forum to see if they are in there or if the list provides another option