I'd happily try some out, myself - maybe pushing or pulling processing, etc, just to see the effects - but it's the processing cost that is prohibitive, let alone being a LOT of film. (Anyway, playing with colours & textures/grain is 'more fun' digitally).
An unsolicited suggestion (Holga-wise) is to try some tungsten film with the right (or even wrong) filters. It depends on whether you want colour accuracy or a bit of wierdness .... Holga + accuracy = ?