I have used the "molded in the ear" type for the past 12 years, and only have had to get them remade once. Most likely due to a change in weight (not thinner either). The last time I had them made was when I was at the ATA Trapshoot in Vandalia, OH. They are not electronic, and cost $25.00 for the pair. I can use them as molds for the electronic type by sending them to either Custom Ear Protection Electronic Hearing Protection Custom Ear Plugs Hearing Protection Devices.
or Earinc/Insta-Mold - Worldwide provider of customized earplugs for hearing protection and communication systems
They work pretty darn well, and I'll use them along with muffs when shooting ported handguns or rifles from the bench if the muffs will allow me to get the correct cheek weld.
I have used a set called Sonic II's that are sort of like the westone ones, and I had a 20% hearing loss in my left ear shooting a .22LR rifle indoors after a month. Granted, it was on a small 4 lane indoor range, but the only thing that was shot was .22LR rifles (3 position, 50' matches). I averaged 500 rounds a week in practice..........