I have a 1991 accessories catalogue that shows a range of Grundig and Blaupunkt radio cassette players as options. I have put a Grundig in our Uno and it looks just right. Ricambio International sell original hinge aerials online. I remember mine was a bit of a target for vandals back in the day but quick and easy to fit.
Talon had a Blaupunkt radio tape deck with matching speakers in the rear trim next to the rear seats (next to where the front seat belts come through) still got it somewhere..
Fallout had a Phillips tape deck one iirc..
what i would like is a radio with tape deck and a small SD card hidden somewhere in it i have seen one but i think its not cheap..