Firewall grommet question for 49 truck

[Rudoo]

I need help with finding a grommet. I need the grommet that the oil pressure line and the water temp line go through into the firewall. I have looked through my catalogs, and don't see anything that looks like it. In this video at about 1 min 14 secs, the grommet that has 2 wires entering. That's it, right? It looks like there are 2 screws holding it. Maybe it's not called a grommet and that's why I can't find it? Anyone know what is is called and where I can get it?
Thanks,
Jonna