Cannot find "Trakhuc.cvl" in tutorial guides

In guides about “Build a 3D Coastal Model” in this link, it seemed that there were no files called “Trakhuc.cvl” in STEP 2.3, whose data folder is downloaded here.There is no “Grid” folder, either. Fig. 1 is the content which was downloaded.As a result, I cannot move on. Could EE add a more appropriate data folder for this tutorial?
2018/02/fig1.jpg
2018/02/fig1.jpg