I have a case of those. They are Junk. They are not 1.4MB floppy disks. 512K sounds about right. I use Cool Disk Floppy Disks. I don't know if they are available in NZ though.The IBM format floppies
http://www.overstock.com/Electronics/Me ... oduct.html
Good thing about the IBM floppy disks I got. I got them for free from the sales lady because she like my free nascar baseball cap so we traded.