My D1s are both much later, like right at the end of the run, so the cubby boxes are very similar to the one in the Disco 2.
I'm pretty sure they all had one although didn't the early ones have some sort of a "fashion" box with a Jasper Conran handbag or summat?
Can't say I really follow these things but this does ring a bell.
Didn't your da ever let you drive it at all? Mind you. Finkin about it, you'd still have been quite young then wouldn't you? Or would you? Can't remember how much younger you are than me but get the feeling it's about 20 years.