5 wt. "tropical" fly line?

Does anyone other than SA make a 5 weight saltwater line? I'm using it on the beach in the middle of summer, so a freshwater line might be too soft...

The SA should be fine, a buddy of mine uses a steelhead line here all year, and it does fine. The 5wt tropical lines are tough to find.

http://www.caddisflyshop.com/rio-bonefish-quickshooter-fly-line.html