Try a five gallan bucket of water and a small tin can for the dripper with a sturdy handle of some kind. Then just experament with the size of the holes till you get what you want for size. they wont be round they will be tear drop shapes but will work well.
Hold the can abuot 2 feet above the water, with a ladle scoup up some lead and pore that in the can (dripper), it will drip out and hit the water and harden. A word of caution keep your lead pot away from the water and DONT get any water in the molten pot of lead it will explode and lead will spray everywhere. And That dont feel so good! also wear eye protection and gloves.
I have seen this done and it works well, but water and lead are scary things to have anywhere near each other! so if you do it take care.
Darrel