Gentlemen,
The OS 91 DF has not been available to us for months. Our last request for an order was told that engines would not be produced in the near future. Based upon repeated and VERY adamant complaints from modelers who are angry with us when we cannot provide an instock date, or the date slips, and insufficient demand to justify a large enough order for OS to produce the engines, we have D coded (discontinued) them for us here in the states.

The 46 is in a similar situation. The demand is simply not high enough to justify Japan producing a run of hte engines. when sufficient back orders exist to justify them, then Japan will produce a single run of the engine, unless it is such a long time they choose to discontinue it altogether.

Unfortunately, friends, the system runs on demand. And if there isn't sufficient demand, then the engines won't be produced.