I needed some of those tiny screws that hold the exposure calculator together and was pleased to find that parts for this meter are readily available. The contact information is:

Lynn Badillo

Pentax Division
National Parts Administrator
3500 N. Windsor Dr. Suite-400
Aurora, CO 80011

Ph. (720)988-2653
Fax (303)799-9213
E-Mail: lynn.badillo@wildernestlogistics.com

She sent me an exploded assembly diagram and parts list, so I'm ready if I need any other bits later.