I've been looking for sample disks for ages, some are really hard to find.
Alex Mauer compiled the ST disks, but I doubt it's a complete collection.
https://archive.org/details/AmigaSou...mplePacksst-xx
I've been looking for the New Dimensions sample disks and also a complete set of the Urban Shakedown disks, of which I reckon we managed to find pretty much all of them here on EAB.