Give hardcores a way to get raid items. Honestly you could just add them to boss slayer shop. The gamemode is pretty dead so the amount of people that will have points to buy raid items is so small it wont affect the economy at all. You're obviously not going to add raids, as it's been a full year since it was released on osrs. I just dont see a reason why hardcore accounts shouldnt be able to get hold of them. If you're so determined on adding raids and therefore not giving hardcores the ability to get these items, just remove the raid items from hardcore accounts on release of raids and give boss slayer points for what the accounts raid items was worth.
Any other suggestions to how hardcore accounts could get these items are welcome.