I have a 2001 Simplicity Derby (Green) built by Ferris. After speaking with two Simplicity dealers in my area, they have told me that there is no ROPS available from Simplicity for my mower. My property contains a few slopes and I have a creek running through it and thus want the protection of a ROPS. Does anyone know where I can go to have one built for my mower or know of a place that sells them pre-fabricated? Will other mower model ROPS fit my mower? Thank you!