I've open sourced both the Illustrator templates for iPhone 6 Plus. Currently the Silver/Gold/Space Gray versions are available for the iPhone 6 Plus. An iPhone 6 version is coming soon.
The PNGs folder includes exported images at 1x, 2x, and 4x sizes.
* 1x = screen size at 1080 x 1920 px
* 2x = screen size at 2160 x 3840 px
* 4x = screen size at 4329 x 7680 px
* 2x = screen size at 2160 x 3840 px
* 4x = screen size at 4329 x 7680 px