To echo that, I don't think there is even much you can get out of that box anyway...most of it was intended to be on the big display. In it's time it was quite a nice box, but has been eclipsed by most other options. According to my manual (to give you an idea, the latest one I have is dated 32 years ago, or 1981), there are only basic outputs to begin with; and I'm not entirely sure it'd hook to much modern stuff out there (perhaps an old HSI, or old CDI or something). Yes they are "cheap", but.....
Sorry I don't have better news for you.
Cheers,
Stein