Did your doctor show you each lab report as she went along and give a full explanation? Meaning, the initial PAP smear results, the first biopsy, and the lab report from the LEEP? Something doesn't sit right about what you have posted, so far. I think you need to get another doctor and have another biopsy done before you go through another procedure. If it is in the endocervical canal, you'll more than likely need a cone biopsy, and I don't want to frighten you, but make sure the endocervical glands are not involved. This is why you need a new doctor who shows you those lab reports and gives you a thorough explanation about the kind of dysplasia you have and how extensive it is.
If you do need a cone biopsy, it is often done via LEEP, but cold knife leaves a cleaner wound. It's not cost effective, so insurance companies try to push LEEP. But consider all of your options before you do anything. You do have them, and you want your decision to be as informed as possible.