Sentinel 3 FRP products

Hello there!
I need some advice about Sentinel 3 product calls FRP. Was it released? If was, how can i get this product? If not - any ideas when it will be and can I, useing snap, create it from source products.
Regards, Alex!
Space Reasearch Institute.

P.S. Sorry if I posted this at wrong category.

As far as I know, they are not released yet.