i got my cat a leash from target. it was very inexpensive. only 3 or 4 dollars
its more of a harness and its got a drawstring method to it so it is all one piece and the harness can be adusted very easily to size. it takes some getting used to. shes still not very comfortable with it. but it takes some time patience and a lot of playing. she is coming around to it. i would try looking at target before special ordering one bc i am sure they are quite expensive that way. also petsmart.com has some great tips on leash training cats.. ill see if i can find the link to it for you! best of luck!