[LAU] need just one more d/a output...

Hi, Just a little question - I have an RME9652 connected to a Tango24 to give me 8 d/a outputs via ADAT; but I really need 9 outputs. I only really need ONE input, for testing/crossover design. The 9 outputs I need are: front L/R low/mid/high, center, L/R surround. So I'm wondering the nicest way to do get my 9 ADAT outputs. Maybe I should just look for a good deal on another Tango24... or, get a Behringer 8000 d/a for less money, and use it for the L/R surround channels. Both those options give me 8 more inputs that I don't really need right now... Is there something reasonable I might buy (and sell my Tango24), that has ADAT, with from 10 to 16 outputs and 8 or less inputs? Thanks! John