I manage a UPS store. Our packing can be relatively expensive, but we're certified to do this sort of things. Most people who work at such stores are happy to cater to specific requirements (provided we can get or are provided the necessary materials) when a customer wants a specific type of pack job done.
Honestly, though, if I were to ship a large pair of speakers, I'd box them with enough padding for moving, and then strap them to a pallet, then build a crate around THAT, and freight ship them to the recipient.
Shameless plug: UPS Stores do freight.
If UPS Store does the packaging to UPS standards, does UPS assume financial responsibility for safe arrival or does the shipper still have to purchase insurance on top?
Yes and yes.
.............. It is the responsibility of the shipper to provide proof of value.
Also, I will say this: in the two years I've worked at my store, I have yet to have a single thing that I packed be broken in transit. That includes everything from large glass balls to tube amps (both HiFi and Guitar) to paintings to turntables.
Also, as I said above, if they're truly large speakers, box them securely and strap them to a pallet! Some UPS stores will do this, mine won't, but I have contacts at other stores who will.
:scratch2:
I assume receipt of payment would work here ??