DetroitMarauder, like Neil Smith said below you should be able to go to your local auto parts store and get a small tube. I would first try and look for plastic filler or plastic hard filler. I bought some by 3M but it was expensive but I had to buy enough to do a hole in a plastic bumper the size of a basketball. lol. But you dont need this much just look for a small tube. It may come as a one single tube or maybe two tubes to mix. Like I said try and get a plastic bumper filler harder product, last option would be bondo or whatever.

But...

Like Neil Smith said, spot putty is great option and very cheap to buy and in a small tube. I have provided a link of what it looks like and the price range. Just go into your local auto store and ask for automotive spot putty and they will know exactly what you are talking about.

http://automotive.hardwarestore.com/...ty-225532.aspx

Remember when doing this to please take your time and do not rush. So take a day your off work and nothing planned for the day to do this. Nothing worse than a sloppy or crappy job. Make sure when you tape off and tape up newspaper for when your ready to paint, make sure to even tape over the edges of the newspaper where they cross over each other because trust me, paint will find a way through. If you take your time and properly setup everything then you will have great new looking results.

Like i said,

Clean area and prep.
Tape off using automotive painters tap and lightly sand the black plastic piece.
Clean area off again.
Take a small amount of your putty and fill in the two spots, just enough to fill in the spots. (buying a plastic filler spreader might help make it easier to fill and not get outside the spots).
Allow putty to dry.
Next re-sand again, just enough to make sure everything is level and sandpaper has etched into the plastic to make a bond with the paint that you will apply. (if you need to add more putty then do so). You do not need to go serious on the sandpaper, a little rubbing will do but nothing serious. Just make sure to get the whole trim piece.
After the sanding has been done and everything is dry and looks good, you will remove the old automotive painters tape and clean area really well.
Now lay down new tape and cover the area well with newspaper and even tape over the areas where the newspaper overlays each other.
Now you will use your spray paint of your choice, I would stick with duplicolor and nothing else because I know I will always get great results. You will ether need to go with semi-gloss black or flat black, whatever you like best. Probably semi-gloss.
Spray up to 3 coats and no less and no more. Do not overcoat or overspray.
Allow 15 to 30 minutes between coats. Even though it may look pretty and nice please allow a longer time to dry as you do not want to remove the paint or cause any damage to your new paint job.

Items:

Automotive Painters Tape
Newspaper
Spray Paint
Sand Paper
Plastic Filler Spreader
Spot Puddy or Plastic Filler

BTW, sorry it took forever to get this information on here DetroitMarauder, as it seems every Commander forum is dead. Come on people we need to keep these forums running.

NOTE: If there is a way to get this black plastic piece off then you wont have to worry about taping up and newspaper. Quicker and easier. Maybe someone here knows how to remove and re-attach the plastic piece.