I use objectdock free on one of my XP systems and have just decided to install NWN2 complete. This meant I needed an icon for program launcher bar; actually it didn’t because the icon the GOG version ships with is fine. In order to prove this to myself I used google to look for some circular icons.
I found a bunch with white backgrounds and in .jpg format. Including this one.
The simplest way to make an icon for my purposes is to use Paint.net and this article at their forums details how to do it. Use the magic wand and edit >> cut, then save it as .png which is good enough for object dock.
Best copy the new .png to the object dock image library.
When checking out the image in order to post it in this article, I discovered that the host site has this as a .png with transparant background anyway, but the research is useful for the future.