If you wanted the unit to run a little cleaner (assuming you're going to use it often), you could probably put a Convertible bellows and fill tube on that bag, so you could use a Type C (or maybe Eureka F & G) bag inside the cloth. You'd just have to change it through the top bag clamp, like the early low-end Hoover Elites.
I did that with my Hoover 913, using a Type C bag adaptor and fill tube from a Model 63.