Spax shocks definitely have a bump stop fitted - I was led to believe that AVO don't but someone recently said they had them as well. Not sure what OEM shocks Morgan used on their later trads, but they may also have built in bump stops on their damper rods.
There is about a 25mm gap between the axle and bump stop when the Mog is fully loaded. As I said, they were recommend/designed by Peter Ballard whose knowledge on suspension matters far outweighs mine
