Hopefully someone here has a similar one, you could make a pattern from it. I copied an old bag for my vac, it was super easy. The real question is: do you have the accompanying hardware? The bag top clip and the round collar/connector part.
Nice. The bag looks like the same unobtainable material as mine. It's a weird golden brown denim. I've been able to find denim in nearly any color except that. I've kindof settled on using black denim as a replacement (I already made the replacement bag, thinking it was a practice attempt), but now I got a baby Cadillac with a black bag, and I'm leaning towards just using the black denim, cuz it'll match the little vac. Sadly the denim available seems to not have as tight of a weave. Good thing I'm not allergic to dust.
My bag is designed differently, but both of ours should have the patented design. There should be a little pocket inside, in theory to catch the dirt, rather than let it fall back into the fan housing. It's pretty neat.
good example of the shape of the dust bag. I just found a link awhile ago a website where they make quality historical mens military and civilian reproduction clothing. they say if you cant find the fabric on their site to send your fabric and they match it. maybe they sell by the yard