There is one vendor making the plates, and I can't remember which right now. They have a waiting list for them, but none on the shelf. I'll see if I can find my old notes.
You will have to remove the camshaft to remove the front plate, however, you can drill the plate that you already have without removing it, with this Tech Tip:
Drilling for a front mountI think it was Patrick's that had a line on someone who was making the new front engine mount parts that nobody else has available.