I have two of the 92-93 cassette stereos with the 5-band EQ sitting on the shelf. One of them has a broken volume ****, the other is mint. I have heard of a few with the broken volume **** now, must be a common problem.
Although the 92-93 is the only one that is a direct fit, the 94-99 stereos will work (see my picture above, I did it...)
But you guys need to check out my Techinfo procedure. In short, the left side of the brackets are different. You will need to drill holes. You will have to add a bracket to the rear of the stereo. Take the one off the old stereo and saw the top piece off. And if I remember correctly the wiring harnesses that you have in your car will not fit into the 94-99 stereo without either filing down a few of the tabs or replacing the harness with a direct fit one (you can buy them at stores, UNLESS you have steering wheel controls, then you must go to the junkyard).
That said, the modifications I described are relatively easy. Let us know how you come out.