Late to this thread but I had to answer issac7.
A typical roll of VISION3 Color Negative will yield around 460 units at 400 ft. There still is sufficient volume for those films that the company can profitably produce that many in a given production run, but please remember a production run within coating would have to be more than one or two large rolls to remain profitable. A coating machine where upwards of 16 layers are being coated simply cannot create one or two rolls without start and end waste on the film and in the kettles, so volumes are required.
Within any company's production system there has to be both manufacturing and financial accounting and how those streams are designed is very important whether they are split up by business units, product families, etc. Although it sounds very easy to "go grab a few rolls of film X and make them for a different customer base", within the manufacturing systems that may be in place, that is not so easy. Entire product data streams for both financial and manufacturing as well as inventory management and real dollars in inventory all are required to create a "product Y" from a "product X". Sarbanes Oxly and good accounting practices mandate such.
So, going back to my beginning, say you want VISION3 50D in 135 spoools direct from Kodak. The company would have to create a manufacturing bill of materials, computer routing to get the roll through the manufacturing systems, inventory management to get the made film from finishing plant to distribution centers, update / change component supply testing to include the new product to screen for things like photohgraphic activity, update the requirements / potential size changes for coating of many master rolls, update all specification, manufacturing & testing documentation to include the new product, and finally any internet documentation, technical sales training and information for customer interface. All new packaging and graphic arts materials would be required for the suppliers, updates to labeling systems and inventories of those components would be required.
It makes a simply request for a product much more complex than meets the eye for one who may not have worked in a complex manufacturing business. And what about that volume? Looking at the example, spooling an entire roll into 135 36 exposure units would yield over 32,000 units per roll. Would sales be enough to cover that make?
Within the new Kodak, post bankruptcy, many of the internal systems designed for different business units could not be changed because of the Alaris split and the costs associated with reprogramming many complex systems in production and accounting. Perhaps that has changed but I would wager it still is a very costly endeavor to create product Y from product X.