The phrase "made only in" is correct and usable in written English.
You can use it to emphasize where something was made. For example: "This limited edition collector's item was made only in Japan."
Ideally a change should be made only in one place.
Exceptions will be made only in compelling cases.
In historic times, pottery was made only in Fiji.
Servomotors are made only in small power ratings because of their high losses and low efficiency.
Around 20 microRNAs, for instance, are made only in human embryonic stem cells.
Once again, then, change has been made only in cautious increments.
But he insists these would be made only in agreement with the troika.
Since beta caseine is made only in udders, so is the introduced protein.
Of course, gran reservas are made only in vintages considered worthy.
The rules specify that mezcal can be made only in Mexico, in nine Mexican states.
Targeting ensures that the genes' products (opsin proteins) are made only in specific kinds of cells.
