[REQUEST] Mega Drive/Mega CD Sample Disks

I'm going to cut straight to the chase. I've been looking around for probably two years now for these disks and disks like them:



But to no avail. I have reason to believe that the sample code given to developers, especially in Japan, is the most likely source of concrete information on a particular, rather popular sound driver, dubbed by the Mega Drive hacking/fangame community as SMPS. I've had very little luck in finding backups of such information, only coming across utilitarian disks containing drivers and software for development hardware such as the ZAX ERX family of debuggers and the Cross Products MegaCD development system. Any help would be greatly appreciated, as this would do a great service to the Mega Drive coding community as a whole.

Also, as a side note, if anyone has any documentation distributed at the time, please also let me know. I know of the "Rex Sabio" releases but there are a few pages missing from some of those documents and the scan quality of our current copies aren't very good. If anyone has any leads on the original PDF files or PostScript documents or whatever was used to print the originals, please also let me know. Thank you for your time!

Edit: And if you have them but cannot share publicly PM me please, I'd like to at least be sure this data is still extant, and maybe get an idea of how many copies still remain.