well the cheapest drop forward i seen was this one a guy had made himself. they realy are simple things and thus most are not expensive. There are so many on the market, coustom ones, long and short , all singing, all dancing ones that even wash p after you. But there is nothing between them, so get one that you like the look of, feels strong, is not too heavy and is a good length for you.
and buy it from a shop, it's not worth mail or net ordering it cos the shipping will be about the same price again..........unless its free.............in which case do that.............