Extra Sources of Boss Summon Items

So currently, a lot of boss summons are locked to daily quests, which is a bit annoying for players. My idea is to match them to how you can get more eyes of fire by giving Adobis the gold teeth; for Pap cracks, trade some Essence of Time (maybe 100-200 per crack? It shouldnt be a massive amount), for other bosses, a relevant etc from their area if needed.