The above linked dcraw version provided by Sebastian is 9.19...
Perhaps you missed this thread/posts re dcraw v9.17 and v9.19 that implements a "3-pass X-Trans interpolation":
http://www.sns-hdr.com/forum/viewtopic.php?f=7&t=1382&p=2975#p2973 and may find it useful background information...
...as well as this comparison with dcraw v9.17 which used a "Bilinear/VNG interpolation" for X-Trans sensors found here:
http://www.ncplus.net/~birchbay/tutorials/x-trans/index.htmDcraw v9.19 was recently released by DCoffin on June 16, 2013; incorporates "Frank Markesteijn's algorithm for Fuji X-Trans sensors"; and "Fix(es) green spots when half-sizing Fuji X-Trans images" so developers have not necessarily have had time to implement this updated 'dcraw' that has a specific interpolation method for Fuji's non-traditional X-Trans senor array... ...you should start to see improved 3rd party conversion software for X-Trans sensor cameras...
For the latest listing of dcraw v9.19 supported cameras see the bottom of DCoffin's "Decoding raw digital photos" web page:
http://www.cybercom.net/~dcoffin/dcraw/...den...