The dock is about 12 years old so I would feel pretty guilty going after the people I purchase it from. I have just a little bit of a conscience.
The cross member is completely ripped off of one side and hanging off the other side so it will have to be cut off before it is replaced.
The problem is not getting power to the welder, I have that. I may even be able to borrow an aluminum welder. I would still need someone to run it.
I would not use a welder whose only experience was steel. Welding aluminum is different skill. I learned that the hard way! I had rub rails welded on to a pontoon boat I have in Florida and the welder burned holes in the pontoons that were very difficult to repair because the holes were partially behind the newly installed rub rails.
I will call the local shops tomorrow, including Spooner, and see what they have to say.