I needed a professional (no clip) pouch to put the Pre 3 in. I wanted it to fit as nicely as the Pre 2 pocket did and I preferred that it would clean the screen as it was placed in it like the Pre 2 pouch did. I did a little searching and pulled out a case designed for the Google Nexus One that fit absolutely to a tee. Like it was designed for the Pre 3. I am posting the link. This is a direct fit and it is $8.00. Enjoy.
Amzer® Perfect Fashion Pouch Slide-In Soft Case - Onyx Black