I purchased a Monaco pouch holster for my 8830 and really love it. The belt clip is very close to the holster so it stays close to your body unlike the OEM ones that come with them & although it does not swivel, I do not even notice it when sitting or in a vehicle with a seat belt on.
The front of the holster is the same hieght as the back, so it affords greater protection for your BB, yet after a couple of days of break in, to comes out & in very easily for me.
With the front being taller, the magnet is more at the top of the screen, vs the position of the OEM which is more at the bottom, but it goes to sleep just the same.
Good luck in your search! Blackberry Pearl Accessories - Monaco Slip Pouch with Sleeper