In legit OSRS you can complete the Elite Karmja Diary and from then on dragon bars are noted when dropped. The dragons always drop 5 bars and are a common slayer task (at least based on the people I see there) and this would really help offset the inflating costs of bars in-game. Also, it's a feature that should be in the game anyway..... You've added the gloves from this task to the achievement shop anyway.
So...........
Let's make it a thing so we can all be happier and not have to bank after 3-5 kills?