I'm wondering if anybody knows a CD player/ stereo that would be a close fit for a 1980 Datsun B210

Hi there.

I'm sorry that it appears no one has responded before now -- if what you are looking for is just a unit that will fit, all aftermarket stereo installation places carry adapters that can fill in any gaps between the old head unit dimensions and the new one. If you are talking about something that approximates the look and feel of the original unit, you might have better luck asking your question in Gen Chat. That gets more traffic.