Botani is a little store on W. 36th St (btw 7th & 8th Aves), that I’ve always thought of as a button store. Recently, however, I’ve discovered that they have re-invented part of the store, and now carry an amazing assortment of chains attractively priced by the yard. Better still, they are on sale for 20% off right now (I asked for how long and was told the sale would be going on for about a month).
I looked on-line, but apparently you can only get these chains in the brick and mortar store.
263 W. 36th St.
New York, NY