It's certainly possible, but availability of the necessary precursors is a limiting factor.
Keep in mind that the 2 and 6 positions of MDMA are not equivalent. While 2-FMA and 6-FMA are one and the same, 2-fluoro-MDMA and 6-fluoro-MDMA are two distinct compounds. Both could be very interesting, but only the latter could be made from readily available precursors, as far as I can tell. Let's not get into any synthesis talk, or the thread will be closed.
The nomenclature gets a bit confusing once you add a fluorine. 6-Fluoro-MDMA is more correctly called 2-fluoro-4,5-MDMA, as the fluoro substituent takes priority. The other is 2-fluoro-3,4-MDMA.