I'm not sure how to. I'm still new to all this, and I'm kind of getting to know who is who. I contacted LZ, and he responded there were no Alps extras. I had one user who was thinking about selling his, but hasn't responded to a pm in weeks so i'm assuming that isn't going to work out.
I don't know where to begin to have a shop make a plate. I don't have any plans or drawings of any sort, and I also don't know how to ensure LZ level of quality on a plate.