Darren, I was reading about crmauch's project the other day, and went looking for the site where I had seen a lot of test data on carotenoids in different tomato varieties a couple of years ago. This is raw data from specific seasons, not the same as direct confirmation of a gene, but it is interesting all the same and gives some good indications if there is no research source available to directly confirm a specific gene.
I finally found it again, here is the site:
http://treecropsresearch.org/heirloom-tomatoes/