Installation Parallels 3

Hi

I have been a user of Parallels 2 and upgraded to Parallels 3.

I have purchased a new Mac book and wish to transfer my Parallels licence to my new laptop. When I install Parallels 3 my activation key cannot be used because it is an upgrade key. I cannot use my Parallels 2 activation key.

I assume I will have to install Parallels 2 and then upgrade with Parallels 3? Can anyone tell me where I would get a copy of Parallels 2 from?

Many thanks

BB