There are excellent graphite shafts for irons now. I have one of my Hogan(Apex plus) iron sets shafted with graphite Aldila Gold shafts and my Hogan CFT irons shafted with Steel Project X shafts.

Both set are very accurate and a pleasure to swing. KJ Choi uses graphite shafts on irons and have recently won a tour event.

Try the club before buying as putting graphites onto iron heads without matching head weights and lengths can lead to undesirable swing weights. Properly done can lead to great clubs.