For whatever reason the blue foam Hearos aren't doing it for me any more. My left ear is the real culprit, can't get the seal I need in that ear to save my life.
I bought some of these this week. Radian's Custom molded earplugs. $12 on Amazon.
I set them up last night and let them cure overnight. This morning I put them in briefly and they might just do the job. That said, I am going to go ahead and shell out $130 for custom molded ones. The place that does the molds is in walking distance of my work and I'm just tired of dealing with the cheaper stuff.