Just looked at the Navassa 5 antenna, pretty well sums up what you need, albeit with the trad bands but it is feasible with not so much weight gain. https://jkantennas.com/jk-navassa-5.html failing that, the warc bands antenna is a stripped out version by the looks of it https://jkantennas.com/jkstore/jkwarc.html 73 Max M0GHQ