It seems that nobody care about screen accuracy these days.
This is a comm pad that I cast in resin from my mould. I had sculpt it to be as accurate as possible to the original vacuuformed comm pads, complete with warts and all. There are three holes below the two buttons at the top. The sides of some of the buttons are deliberately wonky, trying to replicate the angles on the real props. I have also drilled the holes in the speaker grille at different depths to match pictures of the real props.
I made the first master in 2007/2008 for trooping, but have modified it a bit since then. I have sold a few a few years ago, otherwise I make them only at cost for people in my RL base and 501st garrison. The problems are first that I don't have that much space and second that prices are higher in Sweden, so I won't get them sold easily when there are people overseas making them for less. Also, not everyone cares about screen accuracy - they want idealized props.
However, only a year or two ago, I came across this picture of a picture (...) of a guy building Dengar armour, which shows there being yet another detail below the four buttons on the bottom.
I have added that to onto my latest casts as a piece of styrene. (BTW. the TIE comm pad's paint job was not approved by my 501st GML)
I think that it would be cool if someone would cast comm pads in some flexible material. I find it a bit weird that Clonetrooper costumes have comm pads that are supposed to be rigid in the movies replicated in flexible urethane foam rubber but X-wing and TIE fighter pilot costumes don't.
Some clone costume parts are cast in urethane rubber with white or grey pigment.