Our queen bed is terrible and we need to replace it. The end corners are rounded so I don't think I can go to a regular mattress store. Does Searay or some boat place sell really good mattresses? What does everyone do when they want to replace their mattress? I have metal rods in my back and my husband and I have both had several back surgeries. We can't stay on the boat without changing this mattress, would appreciate any help you can give!