A set of helper tools is available for the Semi-Virtual Diskette to allow it to write and convert NIB, DO and PO format files. There’s also an update to the Apple instruction pages explaining the process in detail.
The SVD is a hardware device that emulates a floppy drive, and connects to both a PC and an Apple II, TRS-80 or Heathkit H8. The cost is $110 assembled or $95 unbuilt.