Perry
Firstly how's the setup for the new owner? You can move the pedals aft. It depends if the original builder allowed for this. On mine when I built it I put extra holes in. So it's worth checking to start with. if there aren't holes you can move the pedals back and drill new ones, however it will also depend upon how long the centre bracket is as to how far back you can come. If it's been shortened you might have to fit a new longer one.
Then the rudder cable to pedal attach bars need to be shortened to bring the bottom of the rudders back.
Another option is a pedal extension see
www.jdairparts.com but this will only give you about an inch.
Cheers
Peter