http://www.baysideperformance.com/in...cPath=1051_550 or http://www.pazzoracing.com/ to name a couple.
I remember a mistake I made with my other bike with aftermarket grips. What a total waste of time and money. The stock Suzuki grips were much better. The only real fault with the OEM grips were the plain black colour. The aftermarket ones I encountered were too soft. Did not last long. Does not fit quite right. Yada. Yada. Yada.
I don't want to go through that nonsense with levers.
I had the chance to demo the new GSX-R750 recently. The levers on that bike seems to work much better. Can't really say why.