I've got a piece of conduit I'm planning on bending to match a nils handle this winter for my mora. I've got access to a nils handle so I can make it exactly the same. After using my fathers 8 inch nils and finding out it's easier to use than my 6 inch, I have to at least try! Strikemaster sells the offset handles for $25 or so plus shipping, but I have the conduit and it's only ten bucks to rent the conduit bender from my local hardware store. You have to call strikemaster to order it, they don't have them listed on line...
Not sure you could modify an existing handle, though.