Grieg second piano concerto fragments

[rachmaninoff_969]

I read somewhere that Edvard Grieg had begun a second piano concerto called the "Mountain concerto" but never finished it.  Firstly, is this true?  If so, is the sheet music available?

Thanks!

- A

[klavierkonzerte]

there's a recording by naxos for solo piano.

and i found an intresting recording on classical archives of a concerto based on sketches by grieg
i liked the concerto but i can't remember the name of the composer.