Thanks for your question. I did an extensive search online and also spoke with one of our contacts at Mohawk and the general consensus is that the Mohawk Fusion walnut laminate that you are looking for is probably too old to find. Your best bet is choosing another Mohawk laminate that matches your walnut laminate as close as you can. It is also important that you match the thickness and locking mechanism of the exisiting laminate if your will be joining the old and new surfaces together. Here is Mohawk's website where you can view their current laminate selections.
www.mohawkflooring.com/Let me know if I can help any further.
Stacey
www.mohawkflooring.com/
