Two things. First, I haven't used the fiberfix spokes, but back in 1992 when I took a long tour I bought some wire temporary spokes from REI. They worked great. I wasn't competant at truing wheels so there was still some wobble, but the temporary spokes got me to the next bike shop, which a couple of times was a two day ride.

Second, you shouldn't be popping a lot of spokes lately. Broken spokes should be isolated incidents and fairly rare. If a bunch start breaking, I'd say it's time to take the wheel to a good wheel builder and see about replacing all the spokes, or at least getting them all retensioned. A good builder should tell you what your next step should be.