If the logo was a cornucopia in the past, there would be images of old clothing with that logo on the internet. There are only 2 photos on the internet showing a cornucopia logo on T-shirts (a black shirt and a white one). Both show the logo printed directly on the cloth. But back in the 90s that wasn’t a thing. FotL T-shirts had the label sewn in, not printed on. And both photos are of really low quality and monochrome, so you can’t see that the logo was modified with a pen. Also, the logo looks different between those 2 photos.