I have some renters who brought their propane heater for Indiana (yup, the ones who brought the cold with them, too). They say it fits their golf cart up north, but not any cart they've used here.
Anyway, they bring bungee cords to hold it in place. Don't know which model they have, but they did say it costs $80. Regardless, it looks pretty awkward. I've found a heavy jacket and blanket on my knees works as well and I never close the flap on the driver's side.