I've been waiting on upgrading to the Droid 3 because a holster only was not available. Personally do not like the covers.
I found one out now on letstalk.com:
Droid 3 Swivel Holster
Also, found the code LTSAVE25 for 25% off accessories good till the end of the month. Found it at:
Lets Talk® Coupon Code, Lets Talk® Coupons, Lets Talk® Promo Codes