I rock the Alpha Recording System ARS 4100 from Japan. http://www.alpharecordingsystem.com/model4100_en.html
Other mixers are the E&S DJR 400 (Portable) http://www.electronique-spectacle.com/djr400.php
, the remake of Bozak, Bozak AR-6 http://www.bozak.com/
and the N77/N78 from http://www.superstereo.co.uk/
, if anyone ever have been able to buy one, lol.
Also there's projects from other Wave member, you have the Condensa mixers http://www.condesaelectronics.com/
and Perns DIY mixer http://www.bozure.com/