Took a look on the website and there are a few bunk trailers that might work. As Brett states, I did not see any with a prop guard.
I have been trailering my 211 around for the past 5 years. My trailer is a bit of a low rider but I like it that way, I like being able for my wife to be able to see inside the boat from the street. My prop guard is very close to the prop and rudder , it has rollers and they are used whenever I go in or out of a driveway with any slope at all. Without a prop guard I don't think I could make it to the lake once without destroying my prop and rudder. My trailer is a Zieman, they are out of business. Boatmate and Dorsey are the most common trailers for these boats. If your dad values his boat he may want to stick with a proven product. The chine edge on the 211 is easily destroyed with the wrong trailer. Feel free to give him my contact info if he has any questions.
mikeskiw@gmail.com