You can get doubleshot ones from Signature Plastics (http://www.keycapsdirect.com/redesc.php).Show Image(http://www.keycapsdirect.com/images/redesc/red_white_mx.jpg)Show Image(http://www.keycapsdirect.com/images/redesc/red_black_mx.jpg)
But double shots and the option to have white or black font is better anyway :)
I bought one of each red esc key cap from SP and they're alright. You can never have enough red key caps. I bought ALPS switch key caps too even though I only own one alps keyboard. :) You gotta pimp it up