well, with the stereo connector and the monochrome it *sounds* like a 1084S-D1. It should have a 9-pin connector on the back for digital RGB which you should be able to get a cable for.
If you could send a picture that would be very helpful. One of us could definately identify it for you.
If the connector on the back is a 9-pin male connector, I have a 9-pin male to Amiga 23 pin RGB cable that is a spare which I would be more than glad to send to you free of charge to help you get your Amiga running.
Keep us posted!
Thanks,
- Mike