This antenna was manufactured by Cisco/Aironet. The LMC card was really designed for users who needed external antennas rather than the pcmcia antenna (for use in perhaps a barcode scanner or other radios embedded device). Because of this, the volume of this antennas was extremely low, and whoever wanted an attached antenna, bought the PC350 card.
I know of no availability of this antenna today, inside or outside Cisco.
