I am sure that you can purchase longer laces at a local golf shop (i.e.; Golf Galaxy, Edwin Watts, Dicks ProGolf.....)..... You might try 36 or 38 inch laces and it might resolve your problem. They normally come with two pair in a pack. I purchase aftermarket laces when mine wear out and this is where I get mine or even a good shoe repair shop.
Tried looking but had no luck, even in the online golf shops. That's why I finally came here.