Not sure if this has been suggested before but the current bow-casters are only (realistically) usable by 2 advanced classes.
Bowcaster-pistols would be usable by 4 advanced classes (both smugglers and BH's) as well as being, frankly, awesome,
Make it cartel or make it obtainable other ways but IMHO there's people who would chew thir own arms off if given the chance to get one (And not just those who know who Waylander is... a 2 armed bowcaster pistol wouldn't go amiss if you're bored btw)