Rootbreaker
I work for Wesco Distribution. We are the largest electrical distributor in the country. We have a branch at:
Wesco Distribution
1029 Edwards Road
Parsippany, NJ 07054
P: (973) 882-2300
F: (973) 882-2327
Give these guys a call and they can take a credit card and ship it to you. You could use regular THHN wire which I guestimate is around .60 ft or so right now. It is oil and gas resistant but is very stout and hard to bend due to the jacket, but it will work and will be the least expensive. Wesco will have it there in stock but only in black. As gauder said, you can use welding cable as it has a much more flexible jacket. The Wesco guys should be able to find that for you as well. Get prices for both. Wire prices have been going through the roof (just like steel) so I would make the call to the welding shop also to see if they have had some on the shelf for a while that they bought in at a good price. Most of the guys that Wesco deals with have accounts, so just ask them if they will do a "cash sell" for you. It is worth a phone call.
Eric