d2 a8 radio swap

[davidamd]

hello everyone. im new to my a8 but not to vag and still have my by a4 but off road. anyhow.
my 1997 a8 came with the single din audi delta radio but no cd changer. there is a plug in the boot but its in bad shape and not sure it will work if i buy a player. full of verdi gris.

i really want to up grade the set as its a bit iffy anyway as it crackles on volume.

i want to keep it oem what can i put in there that will fit the slot.

i have been looking at the older concerts but unsure if it will fit.