The ones with the little dividers, but the small dividers are not needed. Only fits two strap, maybe three oem, in each slot, but it works for me, for now. I'd like something different.
I think the best thing would be stacking trays. They would just be laid out on the flat surface. Something that would lock in stacked and fill well in a safe or drawer. If I still had my table saw I might just make some up.