[BioC] mirna20.db

[Ed Siefker]

I am trying to annotate a project with BRB array tools.
It uses bioconductor annotation packages for this.

My chips are the new Affymetrix miRNA 2.0 chips, and
BRB requires a mirna20.db file to annotate these.
However it cannot fetch it, and I can't find it anywhere.

Is this a file that I'd get from bioconductor or affymetrix?
Since these chips are new, does it even exist yet?
Thanks
-Ed