Make sure whatever leather case you buy, it is specifically for the 7250/7290 BB models. Any generic 7200/6200 series will NOT work as the 7250/7290 is alittle thicker than the 7230/7280 BB.
If you go to the official RIM accessories store, at www.blackberry.net
, they sell a leather swivel holster that works for the 7250/7290 BB.
I have one for my 7250.
the model number is ACC-08582-001