Mark,

This may seem a little too radical but have you thought about finding someone with the ability to replace the guts of the original radio with the electronics from a modern radio?

This would give you a radio that 'fits' and looks stock.

It's certainly possible....the hardest part would be finding someone with the know-how in electronics to be able to make the transplant.

But the end effect would be killer IMO.

Chris
'85 300SD