Sometimes you can get a rops for a US yanmar from a dealer that will fit your gray. They are expensive but some folks balance that against the value of their life. There are some small welding companies who will make ROPS. There were some manufacturers names that came up in the old club. Does anyone have them? Can you repost. There were some pictures of homebuilt ROPS over at Yahoo that looked really nice. You might find a John Deere rops from a 650,750,850 at a dismantler that could be made to work. The question of ROPS seems to make people nervous. I guess it is the legal liability thing.
Chris