If they can do ANY color, then I have a few based on cars that I've owned. However if they are non-metallic colors then I'm going to need to do some thinking. I think the orange looks really sharp, but this bad boy would be hanging out on my patio and that color is a bit too bright in that setting for me.
I'm not sure about the stack either. It's not something I would remove very often, but as it sits this thing won't fit in my trailer. Either they can modify it or I will since I do welding and fabricating as a hobby. Worst case I can use my CNC plasma table to cut two flanges and then I can bolt it together as needed without sleeving it. I need to take around 12" off the stack for transporting it which will be maybe once a year.