Adding weight to the head is something you might could try first. We carry the standard replacement odyssey putter shaft, but is just 110 grams. You can also put sand or lead powder down the shaft to increase the overall weight of the putter. Did that for some tour players in my day as a way to increase the overall weight of the putter. I do not know of a heavier weight shaft designed specifically for that putter. You might try contacting Odyssey.