Can someone suggest a site to download Argentine teams Boca Juniors & River Plate, and also Portuguese league teams.

I have looked on the MRA site and I amunable to download them from there for one reason or another. Some links do not seem to be working properly on that site.

There must be a site out there where I can download these teams?

Sorry mate but there ann't any places that have either of these leagues out which are FEd compatable. FifaExpress has an argentinian patch, but it uses G2K kits, and it a fifa01 file, so messes up the rest of your rosters.
Our up and coming WBFP patch hopes to include both if that helps but it may not be out for a few months yet. If I here of any other sites with them i'll let you know.
Cheers