New cables are about $10 at dealer in US. I applied some "Liquid Tape" before the install to keep it corrosion proof.

Available at WalMart.
Other options are replacement cables available at WalMart at the battery rack. The eyelet holes may be a bit big, so you'd have to use washers. (Harder to find the short ones.)
Also look at the motorcycle/ATV section at autoparts stores.