Yeahhh I know, I know, you're right it is a massive overhaul and an awesome and fun mod in general, backed up and removed a majority of my mods for it. Relics adds new items though rather than modifying existing items so I feel like they should be compatible if I knew how to get them to properly spawn in DFs containers..
EDIT:
Okay well I did finally get this with DF so yes like console says it's loaded and working as I suspected it should be.
It was in a Hidden Stash though but those are definitely fewer and harder to come by. Not a single one from a loot bag or any other containers but I guess if I do come across others in different types of loot then I'll mention it.