If you want more comfort you can change to 17" wheels (ascertain whether brakes clear the inner rim first) and the higher profile .
If the car had 17" as an option you will be fine.
Sets of wheels should be available from Berry Motor Group as they do wreck cars for parts.
Someone on here may have wheels as well but be aware the date of manufacture on the tyres , in some states the limit of age on tyres when getting a car roadworthy for registration is less than 5 years old.
It is irregardless of how much tread.
Maybe get bare wheels and choose new tyres.
I'm Unsure of tyres for semi off-road but I would stick with Pirelli or Michelin and Continental , going for long life sort of defeats the comfort ideal I reckon.