You have touched my favourite.
I have prepared everything for converting a 22B and everything has been planned out. Excpet for the wheels.
I think the best donor car is the Hagesawa Impreza WRX sedan.
Its rear seat is a seperate piece from the interior tub, and its dash fits perfectly in the interior.
plus it has a center piece where the shiftknob and handbrake are located,
Its mirrors, unlike the fujimi ones, which only have a mirror set and not bases, come in as a complete piece with both mirror bases and connecting bases (like Tamiya WRX STI)
And add a 3rd LED brake light on the base mount of the rear spolier.
Along with subway and limited24, there is another very talented modeler from Taiwan who does a PERFECT job in recreating a 22B from WRC99 and fujimi GC8, whose name is sarafia 25.
You might want to check out his website
www.serafia25.com