@negrotrill I don't know where those stabs come from but for horns your best bet is to check old Jazz songs, there's plenty! Even if there's other music behind it, then just filter it. I do that all the time.
What DAW are you using? There's also lots of VSTs with horn sounds.
I checked WhoSampled on those two songs, and they don't have any sampled songs in common. I skimmed through the tracks that they did sample, back a couple generations to the originals, and didn't find the horn. I could probably recreate it on my Roland though, its just a simple and pretty generic horn stab with delays.