Where can I find mens pajamas with a hook & loop (Velcro) fly, or no fly at all? Single button does not work.

I live in Montana. The shopping is very limited here. I have to drive for hours to a decent mall.
Walmart.com only has Superman & NASCAR pajamas. The Superman PJ’s have a single-button fly. They don’t say what sort of fly the NASCAR PJ’s have. Not that it matters, as I’m not a NASCAR fan.
Landsend.com & EddieBauer.com don’t seem to carry sleepwear for men. Amazon.com has a HUGE selection, but doesn’t list details, such as what sort of fly the pajama pants have.