8 1/4 Seal

While we're on the topic of the 8 1/4, attached to one of the cover plate bolts is a metal tab to secure the brake line. I have one remaining and with one more bend it will probably snap off. I assume there were two originally. What are these called and where do you source them?
Also, there is a T valve for the brake lines bolted to the axle. Again, what is this called?