I didn't use their form and I didn't have a recommendation from my boss. I got accepted with money. Obviously it's not required, though it probably doesn't hurt. They understand that many people don't want their boss to know that they are going to law school. If you can, maybe get a recommendation from a former boss or a co-worker that you trust. Another option is to write a brief addendum saying that you can't get a recommendation because your boss doesn't know you're leaving.
I didn't use Columbia's form, either. Just use the LSDAS form--most, if not all, schools accept those in lieu of their own forms.