Some free images for you...
I created these for my remote control and offer them here in case anybody wants them. If you'd like a different colour, just shout and I shall oblige.
Basically, I wanted something other than the default square tiles and, also, a look that indicated, visually, that these are a bunch of related widgets. I deliberately left them without a border so that they are not adversely affected by stretching. As is, they look pretty good together when the buttons are all roughly square and with color="transparent"...
How do you use custom buttons?