yeah, the market is pretty small. France, America, russia, and china all prefer to design their own. and most of the others have decided to either transition to using their carriers as rotary wing platforms primarily, or prefer to buy established designs from one of the big-4 mentioned above.
since most nations don't really need carriers either i suspect this won't change anytime soon.
honestly i think that if SAAB built a full VTOL jet their odds would be better.. the F-35 isn't, so a lot of the countries with older carriers that ran Harriers just went pure rotary wing, since the harrier was the last true full VTOL jet platform, and refits to run STOVL or pure STOL would be either extremely expensive or outright impossible due to the age of the ships. (the F-35 price point and the many continuing teething issues it has had don't help either)