Our first courtesy flag was a last minute purchase of a Mexican flag at a West Marine in California. After that expensive but low quality flag shredded itself quickly, we started purchasing inexpensive stick flags.
Our first purchase was a stack of stick flags from flagsimporter.com Although these flags also shredded they were a small percentage of the marine store cost. We remove the stick, put a cord through the sleeve where the stick was and tie a loop on each side of the cord. Then we can hook our flag halyard clips into the loops.
We just made a second order from Tidmore flags while we are in the US and this order covers almost the entire Pacific. More countries than we are likely to visit but we the cost of being covered is low compared to buying any flags on the spot.
Plus, having those flags feeds the dream. Even though we are planning on thoroughly enjoying our more than year in French Polynesia, this pile speaks to a continuing journey that we are both so excited about.