If all else fails, I could buy a ticket for you and see if it allows me to send it to your address.
You could transfer the cost electronically.
I'm away in Spain next week, but I'm sure I can still buy a ticket. The only question is whether or not it allows me to change my address.
Hopefully someone will be able to help you out so that this isn't necessary.
Edit: do you really need a client ref for a 5 year old?