49bourbon,

I got my headliner from Jim Carter. The color (gray) does not seem to be correct for 1954 (Pulsar Gray interior) but it might be the correct gray for earlier years. He sells medium brown, black and gray sets.

http://oldchevytrucks.biz/p/1947_1955/fullpage.php?page=151&session=1072420

54/55 suburbans' seat covers were also different from earlier years (maroon/gray). Jim Carter has these wrong for 54/55 but probably correct for earlier years. He sells spanish grain maroon (all maroon) and spanish grain brown.

http://oldchevytrucks.biz/p/1947_1955/fullpage.php?page=149&session=1072423

He also has door panels and rear side panels for suburbans (brown, black, or gray) and, once again, the the colors are not correct for 54/55 (maroon panels) but might be OK for earlier years.

http://oldchevytrucks.biz/p/1947_1955/fullpage.php?page=152&session=1072424

Tim