I saw they sell floppy drives for the a1200 on vesalia.de (both for commodore mainboard and escom). Are these 100% compatible with all amiga software?
I contacted Vesalia a few months ago about a floppy for a Commodore A1200. Regrettably, they no longer have ones that are compatible with the commodore main board. They do, however, stock floppies that work with the ESCOM A1200 mainboard. I believe there is a way to modify the ESCOM floppy to work with the the commodore board. You might search the forums to find it.
Anyway, I ended up buying a High Density Chinon FZ357-A floppy off e-bay and was able to fit it into my 1200 case pretty easily. It works great with PC formatted 1.44MB floppies. You might want to shop for this drive or a Chinon FZ-354 DD drive as a replacement. Just be sure to keep the mounting hardware and eject button from your floppy.
-Bubba