help with a coil gun (or linear accelerator)?

hello, i want to make a coil gun (or something) where is a good place to get capacitors (short of buying them of coarse)?
any help (nomatter how off topic would be lotsa help)

Well, I would try a computer power supply. There u can find capasiters and other parts that you might find usefull, like a power switch, and a place to plug in. You could even use the power supply itself, unless I am mistaken.