This model is untested but the dimensions should be close enough for this purpose. If it does not fit please leave a comment and I will make changes accordingly.

This should be a direct replacement for the XT350 Chain Guard, part number 30X-22153-00-00

Source is here: https://cad.onshape.com/documents/53037c3e0563f3498ba6c20e/w/234531ff4dbda3d74ec094b0/e/0f5d6e8541b4f0fa61ee8693?renderMode=0&uiState=631baa95db1b8943a1fa398a