Dell CS24/C1100 Rails

Hi,

We have purchased a pair of used Dell CS24-SC servers which included the inner rails but we do not have the outer sliding rails.  Does anyone know where they can be purchased from or what other models of the server have the same rails.

As far as I'm aware the case is the same as the Dell C1100 so I imagine rails for that would work, but I am also unable to find them.

Thanks,
Cameron