Hi Rick,
There is a site,
https://papercraftsquare.wordpress.com/tag/htms/
I tried some possibilities on this site and finally could download the file via Yadi.sk
There is a lot of information about these submarines, look here:
https://thaigunship.blogspot.com/201...submarine.html
Scroll down to the end of this site and there is a very nice model of this type of submarine !!