I just had negavite experience from supports and i came out with solution. In the tab where you search monster drops you could make that you type item that you need and it shows what monsters drop that.
Would be specially useful for ironman who need a specific item but don't know where to obtain it. I support this however i can imagine that this is not an easy update.
Definitely support this, currently I just look up the item on OSRS Wiki or sometimes even just a different servers tool to search through drop lists. Would be much nicer and easier if we had our own. I don't believe it's something which would be too hard to do. Seen it done many times and we've already got NPC searching.