Escom A4000T Floppy Drive Bay

[X-ray]

All you need are the rails. You can then use standard 3.5" to 5.25" brackets between the floppy and the rails. Here are the rails:

http://www.pccanada.com/viewitem.asp?id=2439

What you want are Enlight Drive Rails (not Enlight Rail Rack Kit)

Edit: cheaper on fleabay here.