I'm not sure if this is outside the scope of Itemscroller but I think it would be cool if we could scroll through a bundle so that we can extract the item that we want rather than having to extract each leading item after the one that we want. Something similar to this.

I actually have no idea how bundles work, I've yet to ever try them or look into their code... But I suspect this is probably not possible in a client-only mod (except for single player, but I kinda don't like adding single-player-only features).