there's a Dr. J.P.Monda of JKUAT civil engineering department who runs a local agency for that... guess you will have to google that.. also try TKM Maestro..
the entire concept is called sustainable housing due to its base on locally available materials..
what i will remind everyone on the forum is that while walling forms the walls of a house it is but one of 20 different parts of a building..
by saving on on walling you make an active step towards some savings .. however remember hydrafoam only presses blocks into shape.. it can not press doors, wiring, plumbing, roofing, excavations, roads to the house, sewerage required etc... a normal house has about 20 of these major elements...
sustainable housing hence can not work isolation it needs to be part of wholesome concept and for that reason needs to be part of a carefully thought out process... usually by professionals..