If you just want the car there is a 1/24th die-cast offered. I don't know by whom but I have seen it anywhere you find die-cast being sold. expect to pay from $50.00 to $85.00 as this is the price's I have seen them at.
it is marked as Earnhardt like you are looking for.
there are late model firebirds in plastic that could be matched with a current nascar frame. the roll cage would have to be modified,and other work done but it is possible. Has anyone else tried this?