If you can't afford a new (would be repaired, I am not sure of anyone doing repros???) you will have to repair what you have. I would say buy a second hand one in better nick, but there are so many variations in the bulkhead design, depends on how "correct" you want it.
Door pillars, footwells, and top corners can be bought as repair panels, you can even get nice ribbed footwells now.