by Part-Timer » Oct 24th, '13, 12:58
While I wouldn't have put it quite as bluntly as Anjorno, I also think your best bet is to make one yourself. I don't think that the Masked Magician was sufficiently interesting for the general population to have people offering masks like his one.
You can get white full-face masks fairly cheaply and then buy some Payne's Grey (I think it's a bit closer to the MM's Mask than pure black, but you may disagree) and white acrylic paint. Oh, and a paint brush. The paint is likely to flake off over time (as it won't cling well to plastic). I suppose sanding might help with that, but if you are only going to wear the mask a couple of times, this probably won't be an issue.
One advantage of a cheap mask is that you can buy a couple of "blanks" and try again if need be. You also won't feel too scared of making adjustments, for example if the eyeholes aren't right for you, you might have to cut them a bit differently.
Back when I was keen on murder mystery parties, I used to make all sorts of props for me and my guests if I couldn't find anything suitable to buy.