Re: Flying a Flag on Shrouds ?
Johnson Hardware sells Flag Halyard Kits, Although all the individual parts can be bought individually.
Also, if you are looking to fly a full sized 3' x 5' Flag, consider flying it off of the backstay. Under the spreader is fine for burgees and small flags, but the full sized flags look better in my opinion off the backstay or on a staff on the stern.
Courtney is My Hero
If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most - E.B. White