I have a fox lxt go cart have had for a couple of years and last time i was driving it a big belt in the motor broke and i am looking to replace it should most go cart/ dirt bikes stores around here have the part or do i need to order it from the internet and how much should it cost?

the belt seems to be made of leather and on one side has some like rubber grooves that start off small and get bigger it basicly got shredder last time i was driving and had to push the gocart about a mile or so home in 100 degree F weather