So yeah, I found it but now the issue is that for some reason the script to add the item to the player isn't working correctly lol even though I've checked the ids and everything so i got from one rabbit hole to another.
I was able to call on it using the TTW mod that adds FO3 and its assets as a DLC, to which DLC03 and DLC04 ghoul grenades both show when checking the filter, so I know they are in there somewhere.
Here are the scripts in HotLoader .gek form if anybody would ever want to take a look and a link to the mod so y'all can see what I'm going for
https://www.nexusmods.com/newvegas/mods/90401
ReaverGrenadeAddRemoveEffect.gek
ReaverGrenadeRadChecker.gek