Argentina doesn't know what it's planning to buy. Between surplus Mirage F1s, F-16s, IAI Kfirs, CAC FC-1s, Su-24s (believe that one or not), and Gripens, who knows what they'll eventually plump for?
As has been said before though, the UK makes 35% of every Gripen E and will veto any Argentine deal. Of course, Argentina could source the radar, landing gear, ejector seat, etc from elsewhere, but it's not likely.