Look at the Won Pro Heats and Pro Heat II's. They cost a little more than the glass heaters, but they are extremely reliable. I don't think you'll have any losses since the temp didn't get really high and didn't stay up there for a long time. I would cool the tank back down slowly and watch for ich or other stress related diseases for a couple of weeks.
Life is not measured by the number of breaths we take, but by the moments that take our breath away.