I too make my own out of spent cases, copper wire, and solder. They work superbly. . . once they're made.
However, when you consider that the set of dippers Lee currently offers is only $10, I would gladly spend the $10 rather than make one homemade dipper IF the set came in the right increments.
The problem with homemade dippers comes when working up a load. I make the homemade dipper once I have a load developed. But man, if they could produce it for $10 it would be a no-brainer.
For those who expressed interest, I think I'll start a thread on group-buys.