Another hand tapper tool.

http://www.harborfreight.com/hand-tapper-46502.html

I don't think I would buy this one over the internet as it looks like it
could have some issues with the rear clamp on the rod, but that's ok. Its
listed as in store purchase only. LOL. Now if only the local Harbor Fright
store actually stocked much...

I like the Speed Wrench idea. Even with a tapping tool the speed wrench
might be a good modification.