Big Dale/Brimbum Longview and Tyler both have gun shops. I never thought of them as having ear plugs, although you are right they should carry them. I checked and there is a Grainger locally.
I used to shoot skeet when I was in the navy, never used ear plugs back then. Since I had kids I rarely shoot anymore. I prefer shotguns to pistols...hehehe. (hard to miss with that, and if a burglar is in my house, his backside will get pumped full of lead, if nothing else it will scare the crud outta him..LOL)
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As long as I get a bite, I don't want to leave!