I remember these vacs in the late 1960s, to early 1970s. They were Sunbeam's answer to the Hoover Portable, and the Eureka Crown Princess. So these were made around that same time frame of the "All in One", 'Carrys and stores like luggage" type of cleaner.
I also remember them not being all that great,,but OK for the smaller home or apartment. Was the type of vacuum you would have given to your daughter as a present for her first apartment away from home, or as a wedding present to a young couple just starting out in a small place.
It may be hard to find parts, especially hoses and bags, filters and original attachments in this day and age.
These dont come up for sale on E-Bay very often, so i would say they are very rare.
You may find parts and/or bags on E-Bay ocasionally, but not very often.
The manufacture of the bags or parts is ago long discontinued on these older Sunbeam vacs.
I would scour the basement or back room of old vac shops if possible.