I know there's a selection of these stock icons you can get from signature plastics.  I got some to check them out.
What I'd like to see is kitting options themed along with group buys.  Much like KAM playground. {I might just buy a couple of those kits}
Mainly, I'd like to use a macro pad as a control surface for my DAW & I'm certain that there are those who would also be interested if they were aware.  What could be cool is 2u POS keys for common functions like play & record for instance. 
   maybe something fancy ~A little more than the common circle or triangle?  
Is there just not enough interest to offer these kinds of kits?