Argentina would be probably interested in the YJ-83 as well. Their best hope of going up against RAF and RN is to take their assets out from long range. The YJ-83 would be immense trouble for the Type 45s since they are not equipped with a short range anti missile system. The four Eurofighters could be taken out before they take off. The export of the plane, assuming it's fitted with RD-93 engines, raises some questions. If China is able to export aircraft fitted with Russian engines, then that means that the J-11B and all the indigenous Flankers can be exported as well, especially when they have domestic engines.
they wouldn't export any Chinese flankers because even if they can make it 100% domestic it's still a Russian plane. its one thing making them to equip PLAAF/PLAN but to export them to a third country and take business away from Sukoi would be damaging to sino-russian relations. its simply not worth it to earn a few billion but to lose Russian cooperation in more important and critical matters. a couple of billions in export sales is nothing when china is already the largest trading nation in the world right now.