Not sure on the timeframe but I do remember that as well, but not the exact names either. I also seem to remember a big debate over whether MAME should add the coin samples for when you hit 5 or 6 or not. It was decided no and someone was compiling their own with it included for awhile(where is Greg F when you need him?!?) or something to that effect...
Maybe this will give you something to dig around in the Wayback with/for or at least jog your memeory a bit more...