Cisco, Senao and others use the RP-MMCX, also known as reverse-polarity MMCX, that's probably what your SMC card has. Most of the usual vendors carry the pigtails for these.
Now that I think about it, increased output won't help you much with Kismet, maybe you should just go with a standard Senao or similar.
Found a review of the SMC card at
Tom's Hardware Guide