Today I needed to update QuickBooks Pro 2004 to the latest patch level. In looking on Intuit’s site, I found that they had sunsetted their support for QB 2004, and removed all references to updates/patches for the product. After doing some searching, I was able to find an Intuit FTP site with all QB 2004 patches. In fact, patches for products released years prior to 2004 are there as well.
http://ftp.quicken.com/pub/quickbooks/