The dirty

trick ay be to cross connect two floppy ports..
You may have to fake the INDEX signal with the parallell port. Other than that. One computer should be able to fake the floppy of another. WR->RD, Step/Direction etc.. to LPT input.
Failing that. Write a small program in C/Basic that reads track 1..80 ignoring all "errors".
Or if you have an HDD interface, format on PC. Reconnect on the Amiga.