Good 61-key "Rollup" controller.

I am completing out a portable studio for composition using Cubase 8 that fits into a backpack. I currently have a 25-key controller that fits into the back pack, but it feels like I’m working with a harmonica when it comes to composition.

Does anyone know of a decent 61-key “rollup” keyboard that can be purchase in the U.S?

I’ve had my hands on a couple of “rollup” pianos and they all feel and play terrible in my opinion. There’s no key travel, it feels like playing a rubber placemat. (Which is exactly what it is…)