There is a group of us working to translate the Kontakt-only instruments into SFZ format which can be used with the free Sforzando player. https://www.plogue.com/products/sforzando.html
Some are on the site, some are here: https://github.com/sfzinstruments/mappings/tree/master/Pianobook%20SFZ
I just finished the Gentle Vibes SFZ version and uploaded it, and at your request I have done the ST HELEN CLARINET PAD. However, it takes some time between uploading and it appearing on the site.
If you don’t want to wait, the code is below. Paste it into a pure text file:
/* Title: St. Helen's Clarinet Pad Instrument: A clarinet and a viola combined into a blended pad. This instrument is the perfect example of two instruments, lacking that special something by themselves, coming together to form a beautiful whole.