Whatever you do, don't let the UPS store package anything of value for you. They completely destroyed a pair of PBN speakers that they packed for me a few years ago. I usually don't have problems with shipping claims, but that time it was a real bear to get them to pay up.
They used a single outer box (no inner) with popcorn packing material for an 90 lb. speaker. That's it. No end caps, no hard or soft foam. Just popcorn.
Shakey