there's a lab in LA called aimcolor (http://www.aimcolor.com) that will do b-w transparencies from regular b-w film. at $14.00 per roll, it seems expensive to me.(posted 8885 days ago)i think kodak has a kit with which you can process tmx-100 into transparencies. polaroid also has some kind of positive-negative 35mm kit with which you get a positive and a negative, i think.
perhaps someone more familiar with this stuff than i knows exactly what i'm talking about.