You can do the edits right inside Realband if you want - use the audio edit windows and you can cut sections from any track and assemble to one new track.
Audio edit window accessed via the waveform icon at top.
Opens for the selected track.

I would run 32 bars a few times using different (strategically related) chords to get a variety of choices on separate tracks, then assemble to one track and erase the originals to save space
Has worked on a couple projects, but takes a little time.
Actually I'd call a guitar player usually ... but this has worked

(don't let my icon fool ya - that IS me but guiar is not my forte; I'm usually hiding behind keyboards or back in the horn section)

I do not work here, but the benefits are still awesome
Make your sound your own!