Hi vint_mow,
A while ago I made up a rear door flap that was a sidechute for the Victa mowers. You took the rod out of the existing door and put the rod and spring back in place through the new flap and you had a sidechute mower. Put them on Gumtree for $10/15 can't remember and didn't get one inquiry. No reason you couldn't use the same idea on a Rover