I wish I hadn't sold my old C128 setup - I had somewhere between 500 and 700 disks, some with stuff that I haven't been able to find ANYWHERE on the net. For example, there was one 'demo' that started out with a black screen, played a tune by Ben Daglish that was from one of his music selectors, and then revealed a multicolor picture with bouncing lines in the vein of the countless screensavers with bouncing lines. I seem to remember that there was (I think) a bulldog in the lower left hand corner. I also think that the filename was "PICCY DEMO", although I could be wrong (I've found something called this, but I don't believe it was what I was looking for).
I'm seriously considering trying to track down my old disks. A longshot, for sure, but nonetheless I had SCADS of {bleep}.