We (SESE) carry what you might be looking for --
http://www.southernexposure.com/luff...-g-p-1834.html -- we call it Ridged Luffa, aka Chinese Vining Okra, aka Ridge Gourd -- our seed source was Sand Hill Preservation Center -- it's a better tasting luffa gourd (though doesn't make as good luffas as the regular luffa).