Well some of us have to do it manually (i have to do it manually because every single tech brush set i've used doesn't support Photoshop 6.0)
You can make your own brushes for it by simply using a 1px brush and making little lines and gaps in a 20x50px canvas. Make the background transparent and the brush should be black as you can always change the colour later. Then you simply have to select your selection and define it as a brush.
Of course, for most of you guys, you just download the brushes and it's techtech >:(