That all depends on how the different countries use their research reactors. The only reactor whose production could be significantly increased at the moment—though perhaps not to the level of our reactor—is the one in Australia. But not in the short term.
In the short term, the most Australia can produce is about a quarter of the capacity of our reactor. By spending more money on it, over several years, Australia could increase that by two or three times. At that point, the increase would start to be significant.
The reactor that is now being built in France could also have significant production capacity around 2015. However, the operator of the reactor, the Commissariat à l'énergie atomique, also has other uses in mind. It was designed for purposes other than just producing molybdenum.
Elsewhere, there are no other reactors designed solely to produce medical isotopes. It would probably not be economic to operate on that basis.
So the short answer is no. There are others that might, over five to seven years, be able to combine to reach more or less the level of production of our reactor.