Vintage Subway Signs: DIY?

I am thinking that it would not be difficult to make my own faux vintage subway sign. Some of the ones for sale out there cost as much as $500. Granted, mine wouldn't be the real deal, but it would be fun to put some personalized stops on there: places with meaning to me and/or my husband. I just need to find the right size cardstock or canvas, paint it black and stencil on the letters in white. What do you think?

Check out this great chair that was featured in the Los Angeles Times - fun!