We have nearly 90 inches of length to fill with our vanity, Could we design a similar product but with open storage for towels etc. along the sides to add length? We would like double undermount sinks. Since this is a custom product can we get it without the top and install our own granite top? What sort of wood is it made from? Would you please reach out to me about how to move forward? We are very interested in this product. thank you