Hi Charles,
Here's a pic of what the original radio would have looked like. I'm not sure if the remote came with all of them, but many are either missing or broken.
The model is AE2000. I'm not sure of the make. I remember it was something weird like Forest Park or something. I can't find a pic that shows the make anywhere. I do have a pic of the back of the unit and it doesn't show anything new besides the serial number.
Oh, the backlight either went out on almost all of these or there wasn't one to begin with, because the face is extremely hard to see. If you get down with either really good light conditions or a flashlight, you can see the screen to tune the radio.
If the hole is larger or you have two holes, then you probably had the optional CD player, which attached to this radio unit.
There's a few people who suggest replacing these old radios anyway. I common replacement is an aftermarket car stereo or even a take-out unit from a vehicle. I think that's just about your only option now because the company that made these is probably out of business. You could also replace it with a new Voyager, which is what was used in the later Sunline years, but I'm not sure if that would make sense cost wise compared to a better car stereo. The only problem with the Voyager is it is roughly the same size as your hole, but rotated 90 degrees.
Jon
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2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9473.8 (as of 6/18/21)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR