Here is a great resource for all your one stop shop for all your flat sketching needs. A time consuming task to create CAD flat sketches, they just made it easier for you so you can tackle other projects. Check out SKETCH-FOLIO.com.  This online resource provides current available library of trend sketches that's updated on a weekly basis, swatches, brushstrokes and many more..... They also offer custom sketches based on your needs.

What you receive in a download:
  • Time saved
  • Current silhouettes so you can customize them quickly with YOUR brand and YOUR colors, prints etc.
  • A zip file with: Adobe illustrator file in CS3 with the necessary brushes and swatches, a “thumbnail”.png file (250 pixels x 250 pixels)
System Requirements:
Adobe Illustrator CS3 or higher for Macintosh or Windows operating systems.  You can also contact them if you have other custom format requirements.