Character images consisting of multiple sprites have seams when upscaled

Hey guys, I’m currently working on a Fan Game in Unreal Engine and it requires sprites set up with three parts, a left side, a right side, and a head.
Now when added to the widget, the sprite needs to be sized up quite significantly but when I do this it adds seams to the portrait.
I’ve messed around with the filter, and Nearest gets rid of the problem at the cost of the sprite looking terrible. I was just wondering if there’s possibly a way to scale up the image without having those seams and maintaining the quality
Here’s a image of the problem.