Bill and Wife-
So long as she can see over the dash just cut out a maybe three or four inch thick piece of foam in the shape of the seatback and set it behind her to move her up. When not in use you can store it in the trunk. If you want to go all out you could cover it and use matching piping and maybe a nice Triumph patch on it. Or I'm sure you could go through a whole lot of rig-a-ma-rol with some bracket arrangement that relocates the seat tracks forward.
Hey, how about platform driving shoes?
LCJUTILA