Maybe you are interested:
http://www.mjm.pl/nicam_f15a.html
It is in Polish, but look at the parameters.

This board decodes many sound standards including A2 and NICAM. It needs 5V, 12V and SIF sound input. It outputs analog stereo sound. It is programed to choose the best sound available which would be NICAM both in Poland and in NZ case. It looks it uses Micronas MSP3410D as a decode chip and some onboard microcontroller to program it. It is normally used for converting TV's and VCR's imported from Germany (Stereo A2) to Poland (NICAM).

The price is ~US$27 per piece excluding shipping. I will definitly try it by the next opportunity.

Tomek