For Custom bullet molds a lot of the makers dont make nose punches, so try this:
To make your existing nose punch into a custom one, buy some Devcon, plastic steel putty #10110call 1-800-933-8266 to find were to buy in your area or Brownells carries it. It mixes two parts like glass and its used for metal repair.
Take the nose punch and drill a little of the middle out. Coat the nose of the bullet with wax or some good release agent and put the bullet in the lube sizer part way down so it will be straight. I feed mine through the bottom, so as not to damage the nose/ogive. Mix the Devcon per the instructions. Now fill the drilled out nose punch with Devcon and install it into the lube-sizer and let down the arm to let the punch rest on the bullet nose and let dry as per instructions. Just make sure you coat any surface that you don't want bonded to the Devcon.
Good Luck, Chuck