CheffoJeffo, I got some white ones (for wood CPs) from Bob Roberts but I'd have to route 1/4" into 5/8" plywood to use them on my 3/4" CP . I'm lazy and I'm also worried about strength because I'm routing around the joysticks too. Do you know if any of those vendors have the black type for sure?
I've never checked (I haven't run out from a big box I bought some years back), so I could be wrong. I do have some white ones that have been ground down to be thing, so perhaps that is an option for you with the ones that you have.
At this point, my question would be -- how short are your buttons ?
Some of the (really) short buttons won't fit in a 3/4" panel with any holder, even the thin ones. I've only had it happen to me once and I didn't feel like buying a longer button, so I used my Forstner bit to drill most of the way through the panel, then finished with a smaller bit so that I could just attach the nut and then mount the switch directly to the wood.
Kinda like the kludgy solution shown here (except the button I was using was even shorter):
http://www.therealbobroberts.net/leafwood.jpgYou might also want to check eBay as that is where I found mine.
EDIT: here is a pic of the 5 heights I have in my stash. Sadly I only have 2 of what you are looking for remaining (thought I had another bag), but you can see the "ground down" option at the end.