We can make them, but we need a clear consensus from builders about what they want. Ideally we would make no more than two cones, large and small to cover the required range.
OK builders, here’s your opportunity to make a group decision. If we can get a dimensioned and toleranced print, we can offer a price quote. A CAD file may be helpful, but we need TOLERANCES to make it correctly. The wider the tolerance, the cheaper the part.