Hi and welcome!
I'm surprised that Vivitar claim they will stop making flashes, they are quite popular at the entry-level. Might be true, but it would be a surprise for me.
Your best bet would be to go to a photography shop that carries the Fuji and ask them. You're probably not the first one wanting a flash for that camera. You could also head to
www.dpreview.com and visit the Fuji forum. You're sure to find someone owning your camera there, and if you search through the forums, you will probably find your answer already. I would love to give you more help, but I'm not familiar with that camera, except on paper.
Good luck, and tell us what you find!