So tried converting to EU using guide provided on reddit and no dice Just to make sure I did it right:
Downloaded the Bonus Pack DLC Link
Used Param.SFO Editor to change TITLE ID to PCSF00446 and CONTENT ID to EP9000-PCSF00446_00-E000100PRM140DBG (FW BGM Sticker Pack DLC that I did not already have). I also tried to use E000100PRM004SMP as the CONTENT ID, but as I've already redeemed that weapon pack before, it didn't work.
Loaded game, and while there was no damage to my save there was also no DLC to claim