Another vote for Samorga--it's really lightweight so it doesn't make the bag a pain to carry. And as others stated, it helps the bag keep its shape and doesn't have to be removed for storage (I have another organizer for another bag that's not nearly as good).
Similar to @TNgypsy, I did two orders. The first was just one organizer, and it took about three weeks. My next order was for three organizers, and that understandably took longer, about five weeks, though I think they were on vacation part of that time.