Acoustic Fly Rig
There are lots of options for getting an acceptable acoustic guitar sound.
NAI-5
NUX NAI-5 Optima Air NUX Optima Air is a dual-switch acoustic guitar simulator with a preamp for acoustic and electric guitar players. It simulates the acoustic guitar profiles with the best-optimized sound depending on your guitar and pickup type.
Stageman
NUX Stageman Floor Acoustic guitar EFFECT Floor Preamp; Effects Pedal for Acoustic Guitar; acoustic preamp+di with looper/chorus/reverb and freeze effects; controls: chorus, reverb, notch filter, gain, bass middle, treble;