Vivaldi's RV 312r concert question

[musikalischer_wirbelwind_280]

Hullo once more 

I read somewhere that there's a keyboard reduction of this particular flute concerto of Vivaldi, and I was wondering if anybody knows whether it's freely downloadable from somewhere and if not, then what's the publisher's name so I may look for it at the music shops over here.

Cheers!
Musikalischer Wirbelwind