where can i find these? shorts w/ studded backpocket

i've seen a lot of DIY on these types of jeans, where the back pocket flaps open and people stud them. i've done one myself. basically cut a side of your pocket open and stud your jeans (which is super easy.)

you can buy the studs at most fabric/sewing stores and then you just push the stud through the denim and close the back. it's super easy