Here is a perfect example of a small company using 3d printers to make highly specialized and customized products for 3d video and photo recording and viewing. Some of them are add-ons for existing digital recording devices some are new innovative products.
http://www.cyclopital3d.com/
Cyclopital3D designs, manufactures and sells custom hardware solutions for use with 3D cameras and camcorders.
Now you can add creative filters, close-up lenses, wide-angle lenses, lens hoods and even widen the stereo base of your 3D camera and camcorder! Increase your creative options and achieve fantastic results! Cyclopital3D makes lens adapters for: Sony, Panasonic, JVC and Fuji cameras and camcorders.We also offer three options for portable 3D viewing of your 3D images and videos.
http://www.cyclopital3d.com/