i've been looking too since i just bought a big silver bracelet. needed a solid charm with lobster claw to attach to the oval links. only thing i found after one hour on internet is at tiffany.com. they have initial locks, tiffany hearts, tiffany box (my favorite next to atlas lock) that unlock right onto your bag or chain.
Great idea! Juicy charms are adorable. I have that charm too. I never thought about adding it to one of my bags. I usually just wear them a handful on my bracelet.