Hard as Nails
I'm hoping @Troglo3D can release a genesis 9 version of https://www.daz3d.com/hard-as-nails-hd-and-outfit-for-genesis-81-females. I've found its HD details slider to be very useful. It's one of very few morphs available to give characters intercostal definition.

Comments
I don't have it.
Have you tried autofitting it. It look like it should autofit fine.
The outfit should autofit fine, but that pack also includes a set of HD morphs for G8, and that's what OP wants converted.
Yeah - I misunderstood.
If you used the following morphs and then autofitted the outfit, would that work?
https://www.daz3d.com/musculature-hd-feminine-morphs-for-genesis-9
which is also a part of the bundle https://www.daz3d.com/musculature-hd-morphs-for-genesis-9-bundle
https://www.daz3d.com/sy-intense-muscle-genesis-8-81-and-9
The PA literally hasn't made a single product since Hard as Nails, so I wouldn't hold my breath for a G9 update.