Expression Web v3 / v4 or Expression Studio v3 / v4 licence codes required

I'm looking for, in order:

1. Expression Web 4 licence code
Or if not available: 2. Expression Studio 4 licence code
Or if not available: 3. Expression Web 3 licence code
Or if not available: 4. Expression Studio 3 licence code

I've currently got Expression Web 2 and wish to upgrade but cannot find a suitable licence code for v3 or v4. I've got ISOs for both Expression Studio 4 and Expression Studio 3.

Thanks