I have been doing several searches on several forums, even Google, but so far nothing. There a chart where someone has put together a list of all the hotbutton graphics you can use by number? Takes a long time to go through all those little icons clicking one at a time.
OK, I found the TGA files and went through them and saw the icons I was interested in. Then out of boredom I just held down the Scroll arrows in-game and noticed beyond the first batch that they show you, up to around 1300, there are a few runs separated by long stretches of nothing.
Some at 5000'ish, 6000, 10000, then I found the ones I was looking for.
20147 is the Solvent icon.
20206 the Cleaner icon.
So they all seem to be there at least! Have to be in the mood to do this I suppose.