Well, here it is: the Irregular Hunter + Rockman Rockman Value Pack.
According to e-Capcom, the bonus soundtrack is a limited time only deal, you know, a "available while supplies last" sort of thing. In any case, those fortunate enough to get a hold of the soundtrack will be treated to 30 tracks of IHX and RR music complete with bonus artwork.
Unfortunately, it is unknown at this time if the soundtrack will be available through import outlets such as Play-Asia. I'll keep you posted!