Just saw this, and sharing.
It can be downloaded here:
https://musical-artifacts.com/artifacts/456
and more info & demos can be found here:
https://sig-ex.com/2017/03/12/sso-se-looped-sso-instruments/
It's in sfz format but the developer encourages that it gets converted. I'm not an SF2 expert myself, so thanks in advance to whoever migth convert it.
--makoto314