Re: Leaving a band to start a new one? Where to start?
I'm sure there are like-minded players out there, and they shouldn't be too difficult to target.
I'd start by joining forums for the appropriate instrumentation you seek, and make a post in each stating your position. Obviously forums aren't really 'local' and hopefully you're in a large enough area where you'll get enough good responses to pick & choose your prospective bandmates.
As for asking people you already know, why not? So what if they may be involved in other bands, so are you, right? (You did say "one of my bands"...) Maybe some of them are looking for the same outlet you are.