Where to DL Last Updates to Older Versions

Sorry if this is the wrong place, but I will start here. I am interested in testing a variety of Windows operating systems in different versions of Parallels Desktop for Mac. I have licenses for Parallels 4, 5, and 7, which I registered today. (I didn't really need to use the other licenses before now). I would like to load the latest versions of Versions 4 and 5 before running the tests. Does anyone know where I would find these downloads?

Thanks in advance.

Jim

 

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Thank you very much.