Water Cap / Grand

I had an accident with the water cap resulting in the cap falling onto the hot grill and dropping onto the burners. Grill Daddy customer service sent out a replacement cap - which was not listed as an available spare part. Appreciated the service shown. I do hope they start to include this as a part that can be ordered online. I dare say these can get damaged or lost, and I would not expect Grill Daddy to keep replacing as a curtesy.