I'm looking for recommendations for a company that prints slipcases!

I'm looking for recommendations for a company that prints slipcases for three 6x9 soft cover book trilogy. I'm self-published and working with a budget so I'm not interested right now in printing in bulk, maybe 20-50 ct. I can design my slipcase because I'm a graphic designer as well, I just need someone to print them for me! 

Thanks!