I don't know if he checks this thread anymore, but yeah, you can try sending him a message. He may be more active on
Silent Hill Heaven.
You can still buy all Spectrasonics products on their official site, so that's one place to get their VSTs and legacy libraries.
https://www.spectrasonics.net/products/index-legacy.php
https://www.spectrasonics.net/produc...here/index.php
Percussive Adventures was made in 1995 IIRC and has been out of print for a long time. It's quite rare now, so your best bet is finding a used copy on eBay or something.
(I can not legally provide you with any downloads, sorry.)