Idol Oswald Quest item

At the end of Act 3, I collected the idols for Oswald's exchange for gold mission but didn't trade them in, i went straight to maps and now i can't go back to the ziggurat encampment with Oswald, stuck being unable to remove the quest items from my inventory. I only collected 3 of them so its a minor inconvenience for now but could be crippling if you collected all and lost half your inventory

Found a solution! You have to way-point to the Sand-swept marsh in cruel act 3, then run to the encampment you will see Oswald there.