[clug] Swap... 2RU for 4RU case?

[Nemo]

Hi list... an odd little request... my personal fileserver is sitting in
a generic beige 2RU case - does the job fine, but with 4 harddrives it's
a tad warm and fans at speed makes it noisy. 

Does anyone happen to have a 4RU (or 3RU even, but they're less common?)
PC case (for ATX PSU and x86 system) rackmount case that they're prefer
to turn into a more compact 2RU case?
:)

Thanks in advance for any help :)

.../Nemo

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                                                    earth native