looking for a screen printing shop in the boston area that can do jumbo printing

I'm looking for a shop that does quality screen printing and can do jumbo prints that would cover the torso in the boston area. i went through a local company and the prints weren't acceptable and looked all sandpaperish and the white underbase could be seen underneath the colors. ill post an image below to show. butcif anybody knows of good shops with people that take pride in the quality of their products that can do jumbos please let me know. thank you!