Hi,
I am not aware that there is a possibility to get more than Significant Wave Height using SailDocs. The only wind data they provide in the GFS and NDFD requests for 'WAVES' is the significant height.
Requests from the XyGrib grib sever using XyGrib to download provide more comprehensive wave data including height, direction and period for wind wave and swell. This is available for WW3, GWAM and EWAM.
I hope this helps you.
David