Try an automotive paint supply store. You may have to buy a roll to get what you need. I have an '97 SE an have replaced the trim around the lid and some on the lower sides below the tail light. The chrome and black for the luggage rack is a standard type that CSC cut the ends to form a point. I haven't had to change any of those yet.
The guy that painted it put the old piece back on. It wasn't in too bad of shape, just sucked it couldn't be new with a new paint job. I did call CSC and they couldn't figure it out, the only thing they came up with was because it was an older trailer the lip was wider than what the new ones are. I tried looking on ebay and couldn't ever find anything that I thought had a wider gap so pretty much gave up.