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A certain US plastics distribution company sells them for around $0.77 each.

You can find the Flairosol sprayers on the the "jungle" shopping site. I think they're mostly for hair salon use.

Apologize but I'm going to get a bit nerdy about trigger sprayers. I've really like the sprayers that come on Sonax and some Griots bottles but could never find them being sold separately. Finally...