I'm not going to be much help in locating 4-6" cables, but what I've done in my case is fold flat cable on top of itself and hold it that way with a twisty tie. You can shorten the length significantly and everything stays tidy inside.
That is what I tried initially and it didn't work so well. I ended up with two ugly, twisted, folded ribbon cables attached to the dvd and floppy. The hd is problematic because the folded cable is too thick. There are also the three rounded connectors for the switch, usb, and firewire running from the front of the case to the back. I probably would have posted that I tried this originally, if I hadn't been in such a rush.
Anyways, I went to Fry's again today shortly after posting the orginal message, and even though they didn't have any short cables there yesterday, they had a 7" twisted ATA 133 cable today! Unfortunately, it doesn't want to work with my drive. I picked up some 12" rounded cables for the floppy and dvd drive too. Those just lay across the mobo by the pci slots, which are all empty (nforce2 mobo). The 4" or 6" cables would have been ideal - this is fine though. The drive cable works better with a single fold and light twisty-tie. No one will ever see that cable anyways.
All is well now and the case is back on the little beast. Thanks for the opinions.