Mark Smith has the factory repair instructions here;

http://www.bunchobikes.com/repair2.htm

I know he has talked about disassembling the hub from the non drive side also, but I don't see that approach in a quick look at his website. It can be done. You might email him for the instructions. If the tool is the one I am thinking of, you can make one by finding the proper sized socket and grinding the "prongs" into it.