I had this same problem. What you can do is go find the file elsewhere on the web and put it into your portage tree manually. That or find another emerge database that has it and point yours to that one instead. Can't quite remember how to do that, but it was addressed elsewhere on the forums so a search might find it. Easiest to just go download that file from elsewhere on the web (google it) and plunk it into your portage tree with all the other tgz's (/usr/portage/distfiles).
Thank you very much, you are a true gent. I was hunting around the gentoo forum and was in the right place, didn’t know it was just a matter of dropping it in the dist’ folder, nice one!