I agree with L'n'S about Ken Bones at Rush Green (number above)
He recovered (and recushioned) all the seats in theeeee most gorgeous coffee/chocolate leather, replaced cr*p carpet with matching plush carpet, and retrimmed the interior, including plastic trim, & door seal. in our Arrow 2.
Didn't do the headlining or instrument surround though: that wasn't too bad.
Cost GBP2,500.00 and worth every penny
Interior still has that new car/aeroplane smell after 2 years, and new - to - flying pax no longer cr*p themselves when they climb in for first flight, and see holes in the carpet and trim hanging off.
Safe flying
Cusco