I would try steel curtis cab (Worcester, MA). Look at options including rear glass, steel doors vs. plastic, radiator-plumbed heater, and their circuit control box.
I mounted a fan in a rear corner to help with fogging in a Curtis cab mounted on a Kubota L 4310. Also mounted 2 front facing 12v floodlights and 1 rear (to monitor 7' rear blade action when plowing snow at night).
Generally pleased, but the window wiper is too small - be sure to ask about size/ radius.
You'll need a friend to install. It's like an erector set.
Another brand is Lauren (sp?), but they're $$$.