Topic: using multiface I with rme 9652 or other ?

hi,
quick question, I need to have 2 separate digi out of rme interface,
I use atm multiface I, which has 2 separate outs, but unfortunately on both outs is same audio signal,
I was thinking about grabbing something cheap, 9652, or anything from rme, just to have extra digi out
would it be possible to 2 cards working together under total mix ?
what card you could suggest ?
(I can't afford to buy ff800 or ff400, or anything else; just grabbed 2 mytek96:)


thanks for answer in advance