I think the latest kies does now store firmware and even "pre-downloads" in some cases, try it once then take a look in a folder such as
"C:\Users\USERNAME\AppData\Local\Temp\tmp9A2D.tmp. zipfolder\FIRMWARENAME.tar.md5" to see if it's there (or similar folder depending on your version of Windows.... Most important is the AppData\Local\Temp part of the path... )
You could also search using *.tar.md5
If you find that you could extract a copy of it to take a look, it might even be possible to flash it using Odin
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