Inexpensive RF Tags (Anti Theft)

I look for a supply of some tens (even one hundred) small dipole anti theft antennas 1)their length should be 3 to 4 inches 2)I prefer an aluminum ribbon sandwiched between two plastic strips, for equal phase velocities on the upper and underside of the ribbon,for the best Q. As there are hundreds of references on the web,I would need some advice on readily available devices,with a minimum order of 100 items.