The only one I've seen is from Requistions which is a White Name Officer. All the others off exchange are always MALE.
I probably got mine from there then.
Honestly, almost all of the BO's skills are ground based. If there were more space based skills for BOs and they could also, come in superior form, or what ever, I'd be more interested in their quality.
As it stands, at end game, you can't take your BOs on the ground with you anyway and since they lack space skills, except for a few rare efficient saurians, their quality doesn't mater as much to me.