Duster deck lid wing

Good morning FABO, i have a 73 Duster that im turning into a 71 Duster, I wanted to add the rear spoiler wing.I need to cut the underside of the deck lid because there isnt any provisions for a wing there. My question is who sells a quality reproduction Duster rear wing? I was looking at First Place Auto, they look pretty good but couldnt figure which one was correct for my application. Any help or part numbers/suggestions would be appreciated. Thanks in advance...Rich