Unfortunately, there was zero demand for so long they are now labeled as D coded and can not be ordered except as special orders.

Per a few very adamant DF users persuaded us to carry the 46DF again, and we pursuaded Japan to do a run to provide them for us. Sales were nowhere near what we would normally look for when ordering engines, but we continued to do so as long as OS had them to offer us. We still have an order in place for additional 46DFs and we can hope that we will eventually get engines to meet these orders when Japan has sufficient back orders for them, if they do not decide to discontinue them without filling the outstanding orders.