Universal Audio LA-610 Mk II Tube Channel Strip New in Box

ART Pro Audio MPA II 2-Channel Tube Microphone PreAmp Mic Pre Amp PROMPAII

Rupert Neve Designs Portico II Channel Strip - very hard to find.

Universal Audio 4-710d 4-Channel Mic Preamp/Compressor/A-D Converter

PreSonus Studio Channel Vacuum-Tube Channel Strip - Tested & Working

Universal Audio 6176 Vintage Channel Strip (610 Tube Preamp + 1176LN Compressor)

Universal Audio LA-610 MkII Preamp/Compressor (BRAND NEW - OPEN BOX)

PreSonus Studio Channel Vacuum-Tube Channel Strip