all of the mail order woodturning supplys guys have the full kit, wick, holder, funnel, but I have never seen the parts available separate. If you want to buy them in quantities, Lamplight Farms carries them, but last time I had to buy about a gross to cover the minimum.
But because of liabilities, and the fact the galleries didn't want to sell them because of the liabilities, I quit making lamps. Would like to look at making reed diffusers maybe