Shop Vac 3 Reusable Dry Filters 90137

This replaces the 901-01, originally 5 in a pack and an elastic retainer (essentially a rubber band) does this pack come with the elastic retainer?

Where do i buy the ring to hold these bags on?

will these fit shop vac 8030?

Does this fit shopvac model 85s200? the parts finder says it's unsure.