I remember Commodore charged a very fair sum of money for rights redistributing Workbench disks for indie developers (unlike today).
On the other hand, if my memory is not playing tricks with me, there was a freely distributable workbench floppy, that was very limited in usage (lots of features removed) and was built by CBM to encourage PD/home developers.
Today you can do it with AROS 68k + some free Aminet stuff. I have done it. If you want it let me know and I will upload it. It has some limitations though (no clipboard and Arexx functionality) but everything seems running fine.