Not sure what "local" means to you, but Home Depot and Lowes have a mind-boggling selection of them. You can get them for various drip rates (1/2 gal/hr, 1 gal/hr etc). So the possibilities are limitless.
In no way I want to say that using lil drip irrigators is the way to go. It's just what I had available, and it's widely available to many.
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