Well, they are ideal for just about anyone who is looking for coastal option with some fight, the question always is, can these country afford it. Philippine wouldn't be able to afford even just one of these LCS, unless the US is giving them away, there are no way they can be with Philippine.
If they are getting rid of those LCS, I would say a number of Middle East countries that don't need a Blue Water navy is the perfect candidate. Country like Qatar, UAE or Kuwait.
But as I said, they will be most likely goes to the Coast Guard in some 15-20 years for Drug interdiction after the Constellation class is up and running. A bit overkilled but that is the most logical.