A4000 HD Floppy disk drive + other A4000 upgrades

I want to put a second HD Floppy disk drive in the empty bottom floppy drive bay of my A4000.

Does anyone know what makes and models of HD floppy disk drive will fit and work with the A4000?

Or what HD PC floppy disk drives will fit? If I can't get an Amiga compatible one the alternative would be to fit a CatWeasel MKII inside the A4000 and connect up a PC drive (might even do that anyway).

What I'm trying to do is remove all externally attached hardware from the system. Originally I had a SCSI Card connected to an external CD-Rom drive and Zip drive. Plus an external Power Computing Dual Floppy disk drive. If I can fit a second internal floppy drive that will remove the need for the external unit. And I've already removed the need for the external Zip and CD drives by fitting an internal CD-RW so I can read disk with that, but also write disks so I don't need to use zip disks for larger storage.

Other upgrades I would love to get for the A4000 include:

• 060 CPU (but that could be quite expensive).
• Kickstart 3.1 roms (currently it has 3.0 roms).
• Larger HD (I've got a spare 60GB IDE drive so could use that).
• Graphics Card (not sure which is best for the A4000. Any recommendations?).
• PC PSU (original PSU still works fine but is very loud).
• More fast ram. Not sure what best card is to add this. Zorro cards? Recommendations?

Vesalia sell HD floppy drives for Amiga - visit their site: http://www.vesalia.de

For your PSU goto Amigakit they have this to allow you to connect a ATX PSU to your mobo.
They also have the 3.1 ROMS.
As for Graphics cards then the best would be the Cybervision PPC but of course you'd need a ppc board. After that it's between the PicassoIV and the Cybervision 64/3D. Both are rare. You could of course go down the PCI route which would probably work out cheaper.