See how other companies did that after it was suggested here, with their RealTrack instruments that have all the pre-recorded chord playing phrases but also lets you add notes, so you can drag export a phrases as midi, add notes to it to get the chords or solo you want.

"Virtual Guitarist SPARKLE 2 is your session specialist for chords, octaves and single note electric guitar riffs. A true team player that doesn’t hog the limelight, supporting your songs with just the right amount of swagger and style."