I had thought about making my own..You can buy moulds here for doing that..
When I was a boy my father used to make spoon sinkers at home..I thought about doing something like that as I remember that spoon sinkers were good at rising up as you wind them in..Ideal for fishing in weed if they would do that!
I found a supplier in NZ. that had good range of heavy weight spoon sinkers..Good price and very reasonable freight!
I bought 20 2oz. sinkers that worked out to be about .90c. each including freight!! A bargain..
I tried one in my weedy river and it worked like a charm..As soon as I started winding in, the sinker rose straight up and missed all the weed..
I'm using a lead clip system, so even if I lose the spoon sinker it's only a .90c loss!.