M&J Trim in NYC on 6th Ave.
This place has everything you can imagine for crafting..... from chains, rhinestones, studs, ribbon, iron-on patches to buttons, etc.
I was able to pick up a pack of 20 iron-on studs for $8. Unfortunatly, this wasn't as cheap as I thought they'd be...
I have always wanted to stud a few of my iphone cases and never wanted to pay an outrageous amount to do so. I took the studs I bought and glued them on with industrial glue E6000 (found at any local craft store)
*It's ok if you get the iron-on studs, it actually helps because there flat on the back so the glue sticks better.
I bought the Cath Kidston case from amazon and the clear case from a NYC vendor festival.