The firmware referenced by Ken on eevblog is what I have also:
Archive: tds3000_3.41.zip
Length Date Time Name
--------- ---------- ----- ----
4377 05-16-2001 13:31 README.TXT
0 03-02-2007 15:41 disk1/
524368 03-02-2007 15:41 disk1/fwdisk1.dat
4 03-02-2007 15:41 disk1/version.dat
0 03-02-2007 15:41 disk2/
148451 03-02-2007 15:41 disk2/fwdisk2.dat
4 03-02-2007 15:41 disk2/version.dat
238731 03-02-2007 15:41 disk2/fwdisk2a.dat
0 03-02-2007 15:41 disk3/
1454160 03-02-2007 15:41 disk3/fwdisk3.dat
4 03-02-2007 15:41 disk3/version.dat
0 03-02-2007 15:41 disk4/
807748 03-02-2007 15:41 disk4/fwdisk4.dat
4 03-02-2007 15:41 disk4/version.dat
--------- -------
3177851 14 files
The two files for disk #3 fit on a floppy just fine, albeit with only 3k to spare.
-mark