Here are some common Mobile UI elements provided as blueprints. Free PSD created and released by Lorenzo Buosi.
Freebies tagged blueprint
This is a simple pixel perfect, completely free blueprint pattern. The zip file contains a PSD and a PAT files. Source: Dmonzon.
Blueprint Patterns PSD PAT
Seamless blueprint textures for your designs. Included are 10 different patterns in Photoshop PAT format, PNG and PSD files.