That's because others don't have a requirement for it, since they are or are moving to a single type. Also because the Cold War is over, quantity is no longer top priority. There are only a small number of countries left who would need to arm itself against an overwhelming attack by a long time enemy.
And the light fighter end of the mix of the USA and Russia just got heavier. With the F-16 being developed to be the light fighter to complement the F-15, and in a sense the MiG-29 in Russia. Those are the follow-up fighters for the F-5 and MiG-21 respectively.
With so many export countries moving to a single type inventory, it's not worth it to develop a lighter fighter than a Gripen/F-16/MiG-29, you need to compromise in some areas, so you loose the bids, or don't fit the requirements at all. Unless of course, you have a need for it yourself...see Pakistan and India. They might get orders from markets untouched by the West in the future, because they're the only ones affordable and politically attainable.
Having said that, with these expensive 4+ and 5 generation fighters, I can see a market opportunity for a lighter/cheaper 5th generation fighter. Can actually be competing with the JSF for markets in Asia, Latin America and Eastern Europe in the future. But purely export, it has to be a development financed by the company itself... maybe something for Boeing?
You mean not ordered outside their own countries? It will come, at least for the FC-1.