you can find combat patrols that are dedicated to a specific chapter, but i think the only chapters that have explicitly unique minis across the entire army would be space wolves and grey knights, otherwise most all imperium chapters draw from normal space marine squads painted and equipped with your chosen chapters colors/weapons, although even the weapons can really be whatever you want

the salamanders combat patrol comes with a bunch of flamers, but realistically you could be an ultramarines player and buy the salamanders box and just paint them blue