Moving this discussion to the Adobe Camera Raw forum.
Download the trial of Lightroom, and dive in!
Or, try Photoshop/CameraRaw instead. (raw system is same as Lightroom's).
Seems you are looking for DNG Convertor, If so, here is the download link
Adobe Camera Raw and DNG Converter for Windows : http://www.adobe.com/support/downloads/product.jsp?product=106&platform=Windows
Adobe Camera Raw and DNG Converter for Macintosh : http://www.adobe.com/support/downloads/product.jsp?product=106&platform=Macintosh
The OP specifically stated he needs "a RAW converter program" to convert (demosaic) raw files, which is not what the DNG Converter does at all. Otherwise his other sentence "and the Adobe system has been recommended" does not make sense.
If he were looking to convert raw files to raw DNGs, that would mean he already has ACR or Lightroom, just a version that does not support his specific camera model.
It'll be interesting to learn his true need if he reports back.
Also Photoshop Elements, should its subset of Adobe Camera Raw function be sufficient.