Obtaining Reference Datasets for WW3 Gridgen Processing

[CHARANJULURI]

Kindly provide me with information on where I can obtain the necessary files for WW3 gridgen processing, as they are not available on the web portal.
https://github.com/NOAA-EMC/gridgen?tab=readme-ov-file

the required files as following
- etopo1.nc
- etopo2.nc
- coastal_bound_coarse.mat
- coastal_bound_high.mat
- coastal_bound_low.mat
- coastal_bound_full.mat
- coastal_bound_inter.mat
- optional_coastal_polygons.mat

     Could you kindly inform me of the location from which those files are obtained?

[CHARANJULURI]

Those files are obtained from github i provided link bellow

https://github.com/NOAA-EMC/gridgen?tab=readme-ov-file