I need to know where to buy assembly tracks for...

Question

I have a Cosco Jenny Lind crib that is about 6 years old. I have lost two of the assembly tracks for the drop rail. I need to know if anyone knows where to purchase these from. I have contacted Cosco and they no longer have them available, because the crib is no longer made. I bought this crib from Wal-Mart. Any help would be greatly appreciated.