Fax to email problem

Hi All:

i was wondering if somone know where can I get the files rx_fax and the tx_fax and the patch? because they are no longer available on the http://www.soft-switch.org/downloads/spandsp/ for the last version there "spandsp-0.0.6pre3"
or maybe some other version but on the website i didn’t see at all the mantioned files,

just for general information i tried to do the following http://www.freepbx.org/support/documentation/faq/asterisk-with-nvfaxdetect
but again i didn’t find the files that appeared in the insructions.