Hello Ths61, thanks for contacting us through the Intel Communities and for choosing our products.
At this moment we have 2 NUCs with a Haswell processor in it. These are the Intel® NUC Kit D54250WYK and the Intel® NUC Kit D34010WYK.
These 2 products are still under support, since they were release last year. I’m not sure for how long there will be support for them, but I can assure you it will be for at least 3 more years.
Regarding the specifications you mentioned on your post, I’m afraid to tell you that they are not plans yet to have a NUC with 2 mSATA.