Check out RedLotusDesignz’s Treasury Tuesday Doctor Who Madness! Boy, did she find some good ones.
Like this messenger bag with a TARDIS decal.
Or this TARDIS and 9th Doctor Window Whimsy. I love the vibrancy of the blue box.
And then while I was stumbling around Etsy, I found this really cool TARDIS sticker that looks 3D. How cool is that?