Found em

Floating Continent Molten area, if there's 9 coins missing it's most likely this, from the teleporter go right, take the bottom right passageway and follow until a room comes up with a lot of pipes in the middle and three stompers to the left:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=931433224
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=931433172

There's an invisible wall at the bottom right of the second screen with three rings.

this helped.

Man, this was really helpful. Thnx a lot.