I made you a horn preset. It's basically a synth into a tonematch vs. Kontakt's default "Trumpet". I just played a chromatic scale on both instruments and then smoothed it to get the right vibe.
After having played with it for a bit, I find that the question is not, "Can the Axe-Fx sound like a Trumpet?" but "Can I play the guitar so it sounds like a Trumpet player."
The first thing that's missing is breath. I added an expression pedal to control a filter. I still wasn't great at that part.
The second thing that's tough is silence. I added an expression pedal to squeeze the gate threshold so it could make it super choppy at times.
The hardest part is getting the articulations and vibrato "right", especially in a synth with some latency that tends to fight with your sense of swing. So you need to play in an anticipatory way too, and pay close attention to when to play legato vs more punctuated. I quickly had to ditch the pick too, not only for control, but to minimize pitchy burps. Sometimes the glitches and fret ripple work in your favor and cool things happen.
Anyway, it took me a bunch of takes to get close on this, and naturally I'm not happy with my playing. Of course it's also created with a 1-oscillator virtual analog synth, so.... ultimately it sounds like a SYNTH that's maybe evocative of a trumpet. Maybe one of you good guitar players can have some fun. YMMV! Clip and Preset below.
To turn this into a section, I'd probably add another synth voice or two and a little detune, or maybe a Chorus, or maybe set one voice an octave up or down. This gets wonky quickly, though.
PS: I know, it's a flugelhorn rather than a trumpet. So sue me.
http://axechange.fractalaudio.com/detail.php?preset=9809