[Hampshire] [OT] Dell PE 6300 Rails

Hi all, just appealing to anyone with good knowledge of the Dell
Poweredge servers.
Our computer society has a Dell 6300 from donation with some good
hardware in it, we're being allowed to insert it into the university
server room but the only condition is that it has a rackmounting kit.

I've already found the front brackets on ebay and install them but am
now trying to seek out the rails, however there's none directly I can
find on ebay, however there's lots for other dell PE models.

So does anybody know of/have any Rails to fit a Dell Poweredge 6300.

Thanks