I chose a mixed package, as France has its frigates which are already built, the fleet tanker is a real contender, and the Brazilian navy already operates French built vessels, as well as former British vessels, but the only ship Britain has to offer now is the River class OPV. I'm sure Britain will do all it can to push foreward Type 26 frigate. Subs I believe will be from France, or Germany. There aren't many conventional sub designs, the only country with experience now is Germany, as well as Japan, Sweden but both last countries never sold subs abroad.
To cap it all
Frigates and tanker from France
OPV from the UK
Submarines Germany or France.
They are aleardy getting subs from France. THe UK can offer a tanker but most of the UK's shipbuilding is now preocupied with the CVF's, France probably has its hands full with the new Mistral BPC and FREMM's, and gowinds, and SSG/SSN programs..... so I think Italy is the only one who could provide the Tanker.