Our 351M is currently in storage for the winter. We stopped the other day to measure a few things and noticed the sewer hose storage tube hanging down on one side. On further inspection the bracket was completely broken and the other side is also cracked. Has anyone else had the brackets fail? Is there anyplace to purchase the mounting brackets without purchasing a new storage tube? I plan on adding a second storage tube at some point, it just wasn't n the list of things to do this spring, so any help in finding brackets would be appreciated. Thanks.