I was thinking about using a NKA0515DC (http://www.mouser.com/ds/2/281/kdc_nka-45878.pdf),which converts 5 volts into +/-15 volts. I'm still a little shady on how to use it though, and I'd have to use the ground on the arduino, if that's even possible.
It seems to me, that device is going to require more power than an arduino can deliver.
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