Here are a couple places to buy perforated metal sheets: http://www.mechanicalmetals.com/ and http://www.accurateperforating.com/ .
Sure. Foil/metal sheets are great to stay in great shape, but might rip.
malleable can be hammered into thin sheets
to cut large sheets of metal accurately
It will take 46 3 x 8 sheets.
There are a number of metals that can be hammered into sheets, and gold is the best of them. It is the malleability of metal that allows it to be hammered thinly, and a link to that related question can be found below.
Gold is the most malleable metal and can be easily beaten into thin sheets known as gold leaf, which can be as thin as 0.1 micrometers.
The most common tools used to work metal sheets are the following: Guillotines, Aviation Snips, Hacksaws, Metal Folding Machines, Rollformers and a Snap Lock Punch.
Malleability
to cut large sheets of metal accurately
Yes.
A capacitor
This is a malleable metal.