I have branched this out to a separate discussion. -=realsam=- we are not able to offer retail copies of Creative Suite 5 any longer as Creative Suite 6 is our current product offering. If you do have a need for Creative Suite 5 then you are welcome to purchase a volume license and request a backwards license to Creative Suite 5. In effect this will allow us to convert your Creative Suite 6 license to a Creative Suite 5 license.
Because of the complexity of this type of transaction I would recommend you work directly with our Volume Licensing team. You should be able to find the contact information for your country/region at http://www.adobe.com/. Also when working with the Volume Licensing team please reference document kb401582 to help ensure they are familiar with the process you are requesting.