Size 50 circular needle question!

I am looking to buy a set of circular needles in size 50 with a thin cable. Does anyone of some with a thinner cable?? The set I currently have has a cable that is about 1/4" thick.

Thanks!
knitcindy

Knitterā€™s Pride Basix seem to be available up to size 50. http://www.yarn.com/webs-knitting-needles-knitters-pride-basix/ That was the first one I thought to search on.