The Grand series was never designed to drive in the woods, or rocky terrain.
It was designed to haul hay to the race horses and look like a Rolls Royce while doing it.
If Rolls Royce made a tractor anymore. Designed to be looked at as one sips his $1,500 bottle of wine and admires it from their helipad. It smells of money, earned or inherited....
Just kidding!
Make your own skidplate. Buy some 1/8" aluminum or 1/2 " UHMW, take some measurements and go at it. Hire a local if need be.
Or, hire me. I"ll build you a skid plate. It"s not brain surgery. If you can passively buy a Grand L, you can afford my services.