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I know this is a little outside the realm of A-bodies, but I have some left over parts from truck projects over the years. These should fit 72-79 D100 and D150. They will probably also fit D250, but I never owned one to verify.
1) Chrome rear bumper with all mounting brackets. I had this on a 78 D-150 and also on my 72 W-100. One dent, but otherwise pretty clean - $50
2) Class 3 frame hitch for 72-79 D-100, D-150 (probably D-250 as well). Good condition with mounting hardware (missing 2 of the square backing washers that go inside the frame)- $75
1) Chrome rear bumper with all mounting brackets. I had this on a 78 D-150 and also on my 72 W-100. One dent, but otherwise pretty clean - $50
2) Class 3 frame hitch for 72-79 D-100, D-150 (probably D-250 as well). Good condition with mounting hardware (missing 2 of the square backing washers that go inside the frame)- $75