The crack will only grow so bite the bullet.
I had a rock chip in mine and took it to the dealer (Vic Alfonso in Portland) to have them replace it during some warranty work. I called ahead and told them I only wanted OEM glass. They said no problem. I even talked to the service desk, found out who they were going to have replace it and called them too. Told them the same thing, OEM only. They said no problem.
I picked it up on a Friday evening and guess what: aftermarket glass.
The service dept. was already closed so I was stuck with it (I live 100 miles away).
I recently got a small rock chip in it and the insurance had a chip repair company 'fix' it for free (no deductable for me). The chip repair company charged the insurance company $50 which they probably think is cheaper than a new windshield. It is still visible but not as bad as it was. If it had been in the drivers line of sight, they would have replaced the windshield.