I love the retro look, especially when retro trees are used in scrapbook layouts, so I made this one. :) The limbs of the tree were cleaned up a little more after I made the preview, because I wasn't completely happy with them, but I was too lazy to make another preview. :P
Click here to download.
I have a few more ideas for some retro trees that I hope to get to in the next few days, as well. :)