I had the K5 too and strongly recommend the K4... the pic of the K5 looks better on their website, but the K4 is better in person The shipping is expensive... it`ll be around $100... If you really want it you`ll have to email them... their system won`t allow you to order from the US, but they will hook it up if you email them... let me know I can help with that if your french is rusty
V2.0 used a gixxer 750 K5 headlight, with a custom mini fairing made by a shop in France... they sell the whole thing for 450 Euros ($700) here: KMP - Spécialiste de la pièce détachée de GSX-R de 1985 à nos jours.
Let me know if you need help importing it from France... (I speak french).