The unit in the car is the factory unit, which I probably could have lived with except the FM band does not work. The marking and holes in the facia were my doing, in prep for the wider double DIN unit. I don't like the look of the aftermarket facias, using the factory facia I'm hoping will lead to a neater looking install.
Ideally I wanted a double DIN with a reverse camera and CarPlay/Android Auto, but the budget is a bit constrained until I can sell the house, and I've got some long drives coming up. So I found this unit for sale online and grabbed it for $130 with free shipping, which I saw that week at SuperCheap for $220.
Not having the CD player allows it to have a shorter chassis (even shorter than the factory radio) which will give me the flush mount that I'm looking for. Also I can forsee myself accumulating enough junk in the car without having to deal with CDs as well.
The slightly wider unit is the only obstacle for an otherwise straighforward mounting. I've drilled out the spot welds and will shorten the right bracket to use the existing hardware.
After that, its wiring and widening the hole in the facia, will have updates soon.