I made a widget over on Widgetbox months ago, but because this blog is older than dirt and I never upgraded to the Blogger "Layouts" feature instead of the regular ol' "Templates", worrying that doing the conversion would eat up a Saturday better spent sewing, I have not told you about it. Until now.
It looks like this:
Click on that image and it will take you to the Widgetbox page for installation instructions. Unfortunately, because of the "older than dirt" restriction as mentioned above, I have no idea how normal people would install this widget on *their* blogs. Supposedly it "just works," but Steve Jobs didn't harm anyone in the construction of this widget, so take that with a grain of salt.
If you want to make your own random dress widget from your own pattern images, let me know — I'm happy to share the code, such as it is! You'll need to be able to create a new directory & ftp into to rename files for it to work.