You can buy a fid and do the tapered
line splice yourself. I'm assuming you're using a double braided dacron or polyester, like the one that is on mine. There are many books on splicing this type of
line. I've found
videos on
line for 3 ply splicing... a search might turn up video for splicing this
line.
Other than doing it yourself you can ask at a marine pro shop about getting someone local to you to tapered splice the
line for you. The other option is to take the furl apart and send in the bottom unit.