jago2:
Thanks but it really isn't the answer. They are over 3 times as expensive and it simply cannot be done. They've priced themselves out of this market.
I do understand that issue and I sympathize. But to my mind, based on what you have told us so far, it is the more expensive courier or nothing. I don't believe this is amenable to a technical solution.
The problem arises while your products are in the hands of the courier and they do not seem to be prepared to solve the problem. From what you have told us the courier firm is well aware of your concerns. More detailed evidence won't make them more aware.
I know this is not what you want to hear.
...R
PS.. Don't worry. I am not going to say this again