Wifi Only Antennas foe Max BR2 Pro

I have the Max B2 Pro and a great Pyrenees 11 in one antenna on my all metal Motorhome. It’s mounted on the roof, but right over on the driver’s side (needed to be close to the BR2). I often work outside and use Wifi as WAN so I need good external wifi coverage. I have an AP One AX lite for internal use.

The Wi-Fi coverage on the passenger side of the Motorhome is terrible. I can’t move the great Pyrenees because of the cable lengths and the location of the BR2 so I want to get a better antenna Wi-Fi only (2.4 and 5g) antenna to mount on the passenger side of my Motorhome.

Anyone got any idea which antennas will work with the Wi-Fi on the Max BR2 Pro to be mounted externally on a Motorhome. The cables needs to be RP-SMA terminated an at least 12 feet long (15 would be ideal). I don’t want to spend a fortune (say up to $200), as I envisage upgrading to wifi 7 within 12 months

Thanks
Mark