I'm about ready to bite the bullet and start dipping my own swimbaits. Here is what I plan on doing. Take a tall alumimum can (RedBull or Monster), find one just slightly larger that the first one will fit into. Melt some tire weights (free from your local tire store) and pour the melted lead into the space between the two cans. You will need to hold the inside can in place as it cools or it will rise out of the lead. Make sure to leave a space between the two cans (toss a nail or rock - make sure they are dry) between them before you pour the lead.
Just my design, have not done it yet, still in the planning stages.
Before dippin' put the can into the oven and bring it up to 300 or so. Then put the can on the pot. Since lead melts at 627 it will not get soft. The issue is breathing in the molten lead but I always melt lead outside anyway.
Give me your thoughts, again I am just in the mind design stage...have not even bough my plastic from Del yet. I do have my two trout size hand carved swimbaits ready though.