You can use Kenwood commercial antennas as well. I have some Laird antennas https://www.theantennafarm.com/catalog/laird-technologies-exh-155-sfu-2004 tuned for 155, the base is for many Kenwoods. I bought for a TK-2100. They fit my MURS radios; Btech MURS V1, Kenwood TK-2100 and TruTalk MURS-22 (Legacy/Maxon). They are beefy antennas and are stiffer than the Nagoya 701C. Not good or bad, just different depending on your preference. Don't hold me to it, but I bet any antenna claiming to fit a Kenwood TK-3100 would fit the GMRS V1 and be tuned for the freq range. This one looks promising, https://www.theantennafarm.com/catalog/laird-technologies-exc-450-sfu-2042. The antenna farm also has another Laird and 2 Kenwood stubbies that should fit. Not limited to Boafeng antennas.