https://download.cnet.com/Microsoft-SQL-Server-2005-Express-Edition/3000-10254_4-75452277.html for the server files
https://download.cnet.com/Microsoft-SQL-Server-2005-Service-Pack-3-64-bit/3000-18513_4-75452190.html for the service pack 3
i just installed them, restored the database works 100%