It would be really nice to see someone make some of these older formulas. Probably on a one or two short runs per year basis. Maybe if the R&D doesn't really have to be re-created it might even be economical for the manufacturer but I would not expect the film to be cheap to the consumer as it would be a low quantity "custom" product.
Is there anything currently available in 35mm that would be classified as an old-style emulsion? I would like to try one.