Glad you noticed the "i"
Was fun designing that on Inkscape! Of course, the SVG format looks way better, hehe. You can get the envelope pic @
Open Clip Art Library Drawing Together. The opened version is there. I had to "close" the flap so it can fit within the dimensions of the icon
I wasnt too sure about the font. Which font does the Crazy Engineers tag use? The closest I could find was "Nec plus ultra". And I forgot the colour code for the "red" too
Perhaps the envelope should be yellowish?