i thought i had this brush but then i think it got deleted when my photoshop didn't close properlyy ]:

so does anyone know where to find this flowerr brush or have an imagepack? ;D

Uhh, you already have the image and the flowers are seperate. Which means you can make a brush out of them.

All you gotta do is crop/cut out the flowers you want and define the brush.

uhm it doesn't work like that because the flowers aren't black & the background isn't white

you cold desaturate it then use the wand tool (or pen tool/lasso tool for better perfection) to extract the bg...

blah

it'd be like this.
except i used the wand tool so it doesnt look that great lol

If you're good with the Pen tool, then it'll be extremely easy to achieve that. Just make a path with the Pen, following the lines of each flower. Then stroke it, and fill in the petals with lowered-opacity.