Okay I found a 35mm grain element that actually works within after effects. The grain was a bit to fine to match up with the grain where the splice is, so I enlarged it until it looked close. You can still see the static grain if you’re looking for it, but it doesn’t stand out as much now.
I am rendering now. I’ll take a look once it’s rendered to make sure nothing jumps out at me, and then I’ll upload it to google drive and post a link here.