I am trying to get ahold of a fold-down ROPS for my 1989 L4150. It didn't have any ROPS when I bought it and although there are many of these tractors with ROPS I called my local Kubota dealer and they said Kubota doesn't sell a ROPS for this tractor. I was really surprised. Any idea of how I might get one? My property has a lot of hills so I really need to install one. Thanks.