Foah is the compnay that made the 3 optional extra body kits for the k10 when nissan were selling the k10 as new.
They make 3 complete kits with various spoilers and the were avaliable around about 1989 onwards. before FOAH, Haselback made the only bodykit avaliable as an extra for the K10
i have pictures of all the kits but itll take some time to find them. the one Sammy is selling is off my old k10 and by far the best FOAH kits avaliable and very rare as its the only FOAH kit not made from fibreglass so it doesnt break as easy