As my aches and pains increase I installed a new toilet but with an added height to increase the seat height by 40mm or 1 1/2" which does not sound a lot but does help a lot. These pans are becoming more common and can be found in many catalogs from plumbers merchants saving the expense of disability shops who do know how to charge.
Fitting is as straight forward as a normal toilet but it does help with my morning lack of mobility, every other toilet now feels to low.