I did my own UFP flag back in the day with fabric paint and blue material (can't recall what kind). The first one went up in my side yard (I was a kid) on an old rusty TV antenna pole I scrounged from a trash can. It was based on the movie-era Federation logo. The latter one I did was based on the TNG era logo, and was only meant for indoor use on a stationary display pole. I also made one small shoulder-patch flag for a space-suit mockup I was working on. It was probably the best one I did, quality wise.
This is the kind of thing I would have done if I had the resources, except I would have not printed the words on the flag. That's a personal thing. It looks really good, though, and I hope it is sturdy enough to give you several years of enjoyment.
Rob+
Rob+