I've just fitted the same bars to my FZS600 and went for Renthal Road Race grips. Off eBay for about £10. Seem a good quality product and have the Renthal logo to match the bars.
Only thing is they are tight as a ducks back end so be very carful putting them on. I managed to break the throttle twist trying to get it one but I admit it was slightly cracked from the accident anyway.