What's a good Prism2- or Prism3-based USB network interface card?

I’m looking for a USB 802.11 b/g (and/or n) adapter that uses the prism2 or prism3 chipset. I was wondering if anybody knew of a decent card that fits these specs. An external antenna adapter would also be nice.

Also, if anyone knows of a list of cards that use these chipsets, that would be great – google hasn’t given me anything so far, and newegg doesn’t seem to post the chipset data on their product specs.

Thanks alot!