I have a CZ-82 with a stiff magazine release and eject, and know about the grip remedy. I removed the mag release parts, deburred, polished, greased, and re-assembled them. Still no luck, the button is still stiff. Any ideas as to a fix or do I need parts? Where can I get "NEW" MAGAZINE CATCH PUSH BUTTON, MAGAZINE CATCH, and MAGAZINE CATCH LEVER.