It would take a bit longer, but its amazing what a few decades can do - and its completley free ...
Of course you would have to find the spec who would be willing to wait around for long enough.
fortunatly I have!
She is called my wife
Seriously, you could create some sort of parady of the picture of dorien Gray perhaps? You could mash up a whole macabre story line a bit like copperfield does with his up to date time machine/cut in half trick.
You could Have a portrait of you made up and gimicked so that you could cover it with a cloth so the audience couldn't see, and then perform some henious crime (murdering a stage hand ... or put a volunteer/assistant in an iron maiden for example ... blood, gore etc). The picture could then be turned around and be hideously disfigured into a resemblance of what you will eventually turn into. You could then have the picture destroyed in some way (well not really, that would cost too much) and you would have to have a reason. Perhaps you could no longer live with yourself for the guilt ... watch 'picture of dorien gray for ideas! ' Then stand before the audience in complete stillness, the feeling that it is at last all over. And then transform ...........