I did the dash and some avionics work as well.
Seats - £500 each for total refurb.
Headlinings £1200
Side panels all the way around £2000
Dash panels £500
Carpet £600!
I also put in a new intercom and headset sockets wires. Fixed things like the roof speaker and hand mikes etc.
That's not to mention the FM Immune IFR avionics fit!!