The Fujifilm EF-42 flash is likely discontinued since Japanese retailers have started to list it as limited manufacture inventory. The Fujifilm EF-42 is a bit of an outdated flash and there are numerous third-party flashes that now support Fujifilm so it shouldn’t come as a surprise. You can still get the Fujifilm EF-42 at Amazon / B&H Photo / Adorama.
via ogisaku