I am putting together a Millen transmitter and would like to include a 90831 Speech Amplifier. Is there one for sale? I already have: 90881 98080 90902 Scope 90281 High Voltage Supply 90711 VFO Homebrew 811A Modulator Also looking for the following coils: 42160 160 meter final 42040 40 meter final 42015 15 meter final Sent from my iPhone