You can download Real Uploader for free. The free version will provide just a working copy ready to use. With the paid version you will get the full source code project, customize it, change the source code if you're a developer.
Before purchasing please consider trying the free version, because there are "no refunds" offered since this is a digital download. The only difference between the free and commercial version are the features included and the source code minifield.
If you have already purchased the package and lost the email please go to this page to get the download link: Get the download email