Where to buy a single Ubuntu install cd

Respected Sir

Hello
[redacted]
I am a student and studying M.C.A.
I am a really big fan of Ubuntu.I love this OS very much.

Sir I would like to make a request.
I used to order each and every release of Ubuntu from version 8 till
10.10 using launchpad but I can't order 11.04 because its not free,so
I chose to buy a copy of Ubuntu online as I have to use this
version.But there is one issue that they are providing a minimum of 5
pack CD but I need Only 1.

Sir frankly speaking I am very much addicted to Ubuntu as it has
became my prior OS so I need it but I cant afford it as it costs to
high.
Sir I am a student and I myself had to take care of my expenses
and with due respect Its to costly too afford for me.
I have a Dial-up Internet Connection so its a huge thing to download a
copy of Ubuntu.

I know Sir that there are many people who request for the same
thing and Sir I am not asking for a free CD or DVD, I am asking only
for 1 copy which I am going to pay.

Sir Because of me many of my friends started using Ubuntu because its
open source and Ultimate OS.

I duly beg you to take my request under consideration a please provide
me a copy of Ubuntu ,which I can also distribute to my friends by
making copies of it.

So Sir please provide me a copy of Ubuntu please.

Thank you

My Mailing Address:

[redacted]