Custom Jersey Question

Those that have bought a custom jersey at MMP, what can you tell me about the experience? I just graduated from college and my parents said they’d buy me an Astros jersey as a graduation gift. I’m a big guy (3XL), and I’ve been having trouble finding one in my size online. Does anyone know if they have 3XL in the custom jerseys and how much they cost? I would appreciate any advice and info on how custom jerseys work. Thanks and Go Astros!!!