ftp://platan.vc.cvut.cz/pub/linux/ncpfs/ does not load.
Last time the WayBack Machine  has anything for related site  is 2004.
Seems that the kernel's documentation  says that this  is the site. It's up but doesn't have the latest version available for download.
I've e-mailed the author, Petr Vandrovec, at what I believe is a working e-mail address, to see if he is still maintaining it and has a new download site or new releases, or can tell me who is now maintaining it (if any). Will update when I hear back...
net-fs/ncpfs and net-misc/ipx-utils are masked for removal in ~75 days.