CS4 Download?

Years ago I purchased CS3 in store.  After the purchase of a new camera, I upgraded to CS4 via an internet download through Adobe for $199.00 about two years ago.  My computer recently crashed and I have purchased a new laptop.  Although I have my product key / license from the previous download of CS4, a phone tech from Adobe has told me that it is not possible for me to obtain CS4 and I will have to pay $200.00 for the CS5 upgrade.  I do not need, nor do I want the upgrade to CS5 and find it to be somewhat unethical to be told that my $800 investment in Adobe software will not be supported by the company.  Does anyone have any suggestions?  Thank you.