When I got my Bionic I purchased the Verizon Shell & Holster Combo. I didn't realize it would be so bulky (it has the room for the extended battery)
There are two others that I found
Amazon.com: Technocel Holster and Shield Combo M875HOC: Cell Phones & Accessories
Seido has one but it's "Under Development" and who knows how long that will take.
The one from Amazon looks kinda cheaply made. Has anyone found any holsters that are available now? Otherwise I'm forced to keep this bulky one til Seido decides to release theirs