I just realized that I never followed up on the final outcome. The part in question, actually looks nothing like it appears in the LGB parts diagram. In the diagram, it appears to be just a simple rectangular plate, with a small screw tab. In real life, the part also contains a cradle and stand for the headlamp reflector and bulb. The screw tab is also on a different plane than the plate. In other words, fabricating it was completely out of the question. At least for me.
I made many, many phone calls in an attempt to find the part. One person would suggest another and so on. I finally located a possible contender through Bridgemasters here in California. They mailed me the mystery part and...it was a match! I ended up getting the Chloe repaired with the factory original part. Very excited to see the Chloe back to her old self.
It's worth mentioning that I bought the Chloe on eBay. She was sold as new condition without box. When she arrived, this headlamp bracket was broken. As I began the surgery, under magnification, you could see that the part that "broke in shipping" had broken and been glued before. The tell tale signs of cyanoacrylate were there. So when dealing with eBay buyer beware.
I wondered why the seller was so quick to offer some cash back when I told him it broke in shipping.