Where can i find decent quality dvd cases?

I am making my own dvds and want to start printing out case inserts and labels for them, to place into a black dvd case like the kind that are using in real dvds that you buy from the store. I bought some hp or some brand like that, dvd cases from wal-mart but they are like wrapping your dvd in a diaper, the plastice is very flimsy and the outer clear plastic is really wrinkly loose and seems to be made of bag material, they also fall to peices soon after opening. Where can i buy really good standard size cases?? an ebay link or other would be very helpful, ten points to winner!