Cork is easier to damage and not as forgiving or durable as the fibre/composite that comes on the VX. Just did a buddies 30K this weekend and I have to go back and replace the gasket. We found them at several auto parts houses like Auto Zone. Sorry, don’t have a part number but VXes are listed in most books now or specify same year in Trooper or Rodeo.

26K - I’d flush and then do the filter too if you don’t know the history. And change to synthetic.