I think the headbadge would be the last thing to repaint, besides, the odds of finding a suitable replacement aren't bad. Do you have any artist friends who can simulate the decalling? It's not critical to have the exact match if you're repainting the bike.

Your bike has a nice deco script with a gold border. Here's an example of a later Raleigh that your graphics guy could riff off of and modify to suit.