I have found most of the posts on this topic very informational.
Rick, to be fair, in your first post you did ask what anyone was doing to comply(or not to), and I think that where most of the posters were coming from. People in different states with different regs and rules.
To All: Please accept my apology. Quite clearly my command of the written language isn't very good. I can try the excuse that I'm an engineer but I don't think that will cut it.
I have high regard for the last two posters specifically, and with the divers here on ScubaBoard in general. These fellows, along with others have pointed out that my original question asked what others did (or not) to comply (or not) with the Rule.
What I had intended to ask is what methods and materials or sources did they use to comply. I had never considered non-compliance as an option. Additionally, in my own mind (right or wrong) I "knew" the size and need for the flag. I just couldn't find a ready source for one that big.
I never intended to debate the size, local requirements for flags, interpretations of limited maneuverability, or usefulness of the rule. I thought maybe there were other sources that I didn't know about as a recreational boater.
I clearly missed my mark, and in the process offended some of you who didn't answer what I wanted to ask, but didn't. Those who answered that you don't, and why and how you don't, and I brushed you off or otherwise negated your response, I am sorry. You were answering a question I didn't intend to ask, and therefore I thought your responses not bearing on the subject.
In the end, I hope my posting of the USCG interpretation helps some of you, even if it is only so you have made an informed decision - whatever that decision may be. And, I found my source and have ordered flag in post #22 so the purpose of my post has been met. My only regret is that it may have been at the expense of others, which I no way intended.
Boat Safe, and Dive Safe
-Rick