Looking for a custom player death drop that allows for different rewards based on killstreak

Ok, I know this request is probably a bit complicated and it’s quite possible that no such plug-in exists, but I’m looking for a rather specific plug-in to add to my server and I haven’t been able to find it. This is a question for those experienced in plugins, particularly dealing with pvp. I want to make a plug-in that, as the title states, makes players drop a custom item when they die, regardless of whether it’s in their inventory or not. This itself isn’t that hard, I’ve already found one that works perfectly for this, linked right here: https://www.spigotmc.org/resources/...er-players-head-drop-and-more-1-8-1-17.95908/. The reason I’m putting out a post is that I want to be able to make players drop different rewards depending on the killstreak of their killer. I’m imagining a system as such: if a player has a 0-4 killstreak, (btw I’m going to call killstreak KS in the future), then someone they killed would drop a copper ingot named “bronze”. If they had a 5-9 KS their victim would drop iron, a 10-14 KS would get gold, 15-19 get diamond, and 20+ would get emerald. The point of this is that in the pvp server I’m making, the higher killstreak you had the better token you would get upon killing people, and you could trade these tokens in for rewards at spawn. I’m not concerned about the trading, a simple custom villager plug-in will do that, but for the life of me I can’t find a custom player death drop plug-in that monitors and responds to killstreak. I understand this is probably too complex to be a thing, and I’m sure I can deal with players just dropping a gold ingot or something, but if a plug-in such as this existed it would really be great. Thank you, and I hope someone can help me with this.

 

@Liium I made the plugin for you. You can download it HERE.

Let me know if I forgot something or if it doesn't work.