I guess I'll add this in here too, for the unsuited Infinity War look the Supermc Toys "Nano Combat Suit" shipped and actually did end up coming with the arc (despite none of the photos or even the box it comes in showing it before)- you just have to apply it yourself. Also included some hand sleeves to give the jacket the thumb holes look. Put it on a cheap loose body and unpainted head I had close at hand just to check it out, still need to order proper body to use with this suit. Came out nice!
Decided to glue a thin neodymium magnet from my pile on the back of the arc and put another magnet behind the shirt, so its not permanent. Works alright for a quick fix