The Maker 3 can use 12" x 12' rolls of vinyl or fabric backed material and does the cutting for you.
The cutting is so accurate, it's blades make several plus cuts in the same single path as your design.
That said, the largest backer sheet I've seen, on has a length of 24", so you need to use "Smart" materials, which has no need for a separate sheet.
These machines can also cut out up to 2mm thick leathers, as well a papers but you'll need third party leather for a long, wide bellows.
Circuit materials can be expensive, depending where you shop, so be competitive in your online searches and haunt sell items especially.
There are a number of different blades, including deep knives, standard knives, circular knives, etc, so look at some of the better videos on YouTube before buying or borrowing a machine.
I'm still looking for a pdf pattern of a small bellows and a common camera, so if you have one to post, please do
Cheers l.