I saw this mic advertised. It looks like it might work with the K2. It's about $15, and looks vaguely like the now discontinued Elecaft MH2. The specs: dynamic mic, 500 ohms inpedance (sic), PTT, coiled cord: http://www.j-tron.com/product/Dynamic_Microphone.html I haven't ordered one, but thought I'd pass it along. 73, Leigh/WA5ZNU