Thanx Raindog. These coats and bids look like like they might be suitable for what I am after. Being 6 feet 7 inches tall, the Tall sizes are very much appreciated.
While not made specifically for sailing, and not available in Germany, Cabella's guideware comes in sizes up to 5X in regular and 3X in tall. I have not tried the bibs, but the jackets have neoprene cuffs and are great for sailing. They are Gore-Tex and availabe either insulated or uninsulated.