you can get them form alot of places.
like radioshack, stewmac.com etc

but you shouldn't just buy any wire. look for a specific gauge based on what electronics you will be putting in your guitar mate. like high impedance vs low impedance
also if you can buy sheilded wire. it'll cut down on excess noise.
People in the pit take my post way too seriously.

7-String Legion

If you have a question PM me and I will always get back to you.
^Shielded wire, yes. Impedance in that kind of length is negligible.
Current Gear:
LTD MH-400 with Gotoh GE1996T (EMG 85/60)
PRS SE Custom 24 (Suhr SSH+/SSV)
Ibanez RG3120 Prestige (Dimarzio Titans)
Squier Vintage Modified 70s Jazz V
Audient iD22 interface
Peavey Revalver 4, UAD Friedman BE100/DS40
Adam S3A monitors
Quote by Anonden
You CAN play anything with anything....but some guitars sound right for some things, and not for others. Single coils sound retarded for metal, though those who are apeshit about harpsichord probably beg to differ.