Is there a simple way to append markup to a chordname in chordmode?

[Kevin Cole]

I am transcribing a score that has alternate guitar chords listed for capo'ing. For example,

F(C)         Bb(F)        Am(Em)

I would like to use F. Bb and Am as the "real" chords and append "(C)", "(F)" and "(Em)" as text. I'm hoping to avoid attaching "F(C)" etc. as arbitrary text, to notes in the melody, but instead find some way to attach the arbitrary text to the chord name without "disturbing the nature" of it being a chord.