FME looks a lot like SMA.
They may or may not be the same.
[EDIT] after digging a bit, I found that they are not the same.
I bought my entire WiFi setup from here: http://www.wlanparts.com
They were very helpful in making certain I got what I needed. They have a good number of pigtails available, but nothing with FME connectors. They may be able to help you out with finding a source or a custom cable.
OK, so they don't have what you need, but my research revealed that the cable is the same for both SMA and FME. I would think that you could probably get a pigtail for SMA, cut off the SMA end and put on an FME connector. Just an idea.