need small parts for 78 magnum

hi everyone.
trying to find parts for this car is like finding parts for a 83 corvette. please someone tell me where to find a salvage or a garage that has these parts so I can finish my project.

Steering wheel-black
Rear bumper guard rubber cushions
Passenger seat lower base plastic cover RH side
Rear glass inner lower corner trim LT side
Rear inside dome light lens x2
trunk magnum emblem

its a great car. thanks for reading this. bobby