Can you trace a line drawing of what he wants then take it too Office Max or a print shop and have them enlarge it to the size you want. not sure of the copyright laws but if for yourself (family) and you are not selling or putting in a quilt show I see no problems. You can also check the internet for " line drawing of (what ever)" and several usually show up.
You could do the enlarged pic as a "shadow" in black or a high contrast color to your background color. Good luck. Hope you get some other ideas.
OOPS! Lisa was a faster typer.