I've been replacing some scratched silver trim pieces on my used SE with new black ones, and those trim pieces are expensive. The vent bezels in the center dash have an MSRP of $65 each, and those silver trim pieces on the inside door panel where you pull the door closed have an MSRP of $33 each. Nothing is cheap if you buy it at a dealer. You can generally find most parts on ebay for around 30% off MSRP. I found the vent bezels for $40 each on ebay, but I had to pay full price at my dealer for the door trim because I couldn't find it on line.
If you're removing the center dash vent bezels, be careful - the locking tabs can break fairly easily. The best way to avoid this is to remove the entire radio bezel and push in the vent bezel tabs from the rear. I replaced the vent bezels this way on my SE, and it only took around ten minutes from beginning to end.