adding hyperlink to paragraph style

So I have a fairly extensive set of technical sheets with items. All those items consist of 3 elements, an image, a "text" item in a paragraph style (eg 1457EC) + a body explanation in another paragraph style.

Now the text item (1457EC)I would like to add a hyperlink to that. Every element is also visible on a website, simply by a using this string http://productportal.acertys.com/?webpartid=ACE_ProductDetails.ax&prod uctid= followed by "1457EC"

Is there an easy way to add this hyperlink string to these text elements without actually replacing them with the rather large http-string?

Can it be done by using GREP? By find/replace?

Do I need scripting for this?