Yes, there are. But they are only available in Japan. You can however buy AA to D and AA to C spacers that will allow you to use AA batteries in D-sized applications. The disadvantage is less capacity.  Additional: The current C and D size Eneloops have sets AAA and AA batteries internally.  In the international non-rechargeable battery market, AAs and AAAs have about 95% of the overall volume and 5% for C or D sized cells. In the NiMH market, AA and AAA’s share about 98% of sold batteries. So there isn’t enough of a benefit from making an investment into new machinery for such a minor part of the market. *1