Sorry for the very late reply. I bought some spare used handles off ebay, removed the chrome trim and filled them with epoxy. Lots of sanding to shape them and fill in some spots, then took them to my painter to have him do final sanding, priming and paint on them.Very clean, and definitely loving what you've done with the window trim and chrome. Almost takes the car to a whole new level. Did you paint these are purchase replacements this way?
But there is an option a good friend of mine and I noticed when we were looking for replacements. The '12 MDX's have the same handles, only no chrome insert, the downside is the whole handle is chrome plated. I also noticed that a Honda Odyssey has the same shape handles and they are not chromed... So with a lot less work involved you can achieve the same look.