Has anyone heard of french golden radish and or know where I can find seed?

Seed was once available from Pine Tree Garden. I asked them if they knew of any sources and they were of no help ( I tried Google first anyway). The seed I saved is no longer viable.

It a beautiful long french breakfast type but is golden brown rather than red with a nice radishy flavor on the sweet side.

Wow, I'm getting a goose-egg googling "french golden radish". Is there another name for it that you know of?. or better yet, do you know the scientific name for it?