Try NEI. Their catalogue is online at <www.neihandtools.com> RAPINE has the hollow base mold in their ads as 358149. I corresponded a while back, with John Hilliker who wrote an article in THE SHOOTIST, titled Getting Heeled. John uses custom molds from LEE. You might get a copy of his article from NCOWS? John sets out his experience with heeled bullets and the required specs. I have his email address, or get it from NCOWS.