Try flea markets and antique stores for a nice old rip saw. Study on the web to see exactly what the teeth look like and also buy a brand new three sided file. I use my Henry Diston 11 tooth to rip lots of thick oak cherry and maple. I knew a man who's father worked in shipyards , north of Boston in the 1920's . My elderly friend told me that he helped his father, on weekends, to rip fire wood with a saw rather than split it. So, if you are not overly experienced with wood tools you may be surprised how well the old hand saws work, after you have sharpened a rip saw, you may want to try a crosscut saw. Remember, these saws have been around for hundreds of years and have had a lot to do with some pretty nice wood work.
CW