@Serafini Lapo the diskcontroller need to be DSDD (like corcomp or bwg) as disks are 1440k formatted. 40 track. (I also have a drive mentioning 80 track).
I do have the 3.5 diskdrives for sale as well, but need to relist them again.
My TI itself , has 3x drives 5.25, 3.5, gotek/flashfloppy.