Sound Forge 7 is a discontinued product. The developers have release a more advanced version called Sound Forge 11, and it's available for buying and downloading on the website below. The latest version will cost you 399 $: http://www.sonycreativesoftware.com/buy/soundforgepro
You can also buy it in Serbia. Just select it from the country selection menu, and the page will reload with the new settings.