The EWI came from Sax.co.uk in London, a shop that specialises in saxophones but that has a sideline in other woodwind instruments. They were very helpful.
Unfortunately, my EWI has a fault, in that it won't play if it's plugged in to an external power supply. Sax.co.uk have agreed that the unit should be replaced. All I have to do is get the existing one to London and they'll swap it. Simples.
Herein lies the problem. Aramex, who do so well with their Shop-n-Schlep service, won't insure the package without seeing the original receipt. I did show them a document entitled "Customer Receipt," but apparently that's not good enough. Aramex also want a sizeable portion of the value of the instrument just to ship it: Five hundred dirhams.
At least the thing will run perfectly on four AA batteries, and you can buy a lot of Duracells for less than five hundred dirhams.
But I've encountered Aramex's reluctance to ship from the UAE before. How is anyone supposed to ship used goods when they won't accept them for carriage without seeing some form of invoice, and they won't insure without an original sales invoice that Aramex alone will decide is acceptable. I didn't have any sales paperwork for a small gift that Aramex refused point-blank to ship to Australia.
One solution is to use Emirates Post, where they'll accept a package provided the sender fills in a customs declaration that gets stuck on to the package. Another is to beg favours from colleagues, friends or relatives who are travelling internationally.