hi just signed up to this so sorry if in wrong place , I'm looking for a supplier of an old marshall tufflex gearbox,for a window .sash rebate size 1060mm ,looks to be a 19mm backset .iv trawled all the suplliers I know of including tufflex themselves.i can replace with a standard espag but would prefer a straight swap gearbox.regards. Andy at k glazing ltd ,pontefract .w yorks .