Where can I find Sterling Silver Interchangable Ear Wires?

[lynn's lampwork]

I am selling my beads at a Christmas Boutique in November and I am having a hard time finding Sterling Silver Interchangable Ear Wires, the kind that is just one piece of wire and the bead slips over the top and just lays on a little end cap on the bottom (shaped like an up-side-down "J").

Does anyone know where I can buy these in bulk/large quantities for a good price?

Thanks very much!
~Lynn