The package that comes with SF5.0 for UNIX is present in the following link. You can download it from there:
ftp://ftp.veritas.com/pub/GUI/
You can also follow the suggestion as provided by Marianne, just in case you do not have the product package handy then you can have them downloaded from file connect using following procedure:
Go to site https://fileconnect.symantec.com/ .Then site will prompt you for serial number.
After entering serial number, you can download the product that you have purchased (not all products) as well as all updates for that product.