I'd like to be able to sync a directory across ftp.

[for those who care why: I have a Mandrake 8.1 box and for some reason
urpmi/rpmdrake is busted and no one at MandrakeExpert can figure out
why.  So I want to mirror the updates directory.]

Ordinarily, if I was going to sync directories, I'd use rsync, but
that doesn't seem available.  So, is there anything like
rsync-over-ftp?  From the ncftp man pages, that doesn't seem to do the
job.  Suggestions?

thanks,
r