Sling pouches

I’m working on a quick mod for the latest build and the only issue I’m currently having is that of the sling pouch. I want this item to work like the quiver does for arrows, but it seems that the quiver is written to function along the lines of using the archery json and not the ammo json. I was wondering if there was a work around for this that doesn’t involve switching the sling to archery (which would make little sense). thanks