Depending on how much you want to get into DIY, a friend of mine used to melt aluminum cans and pour them into sardine tins to make the blocks and then grind out the cavities to cast jigs!
Depending on how much you want to get into DIY, a friend of mine used to melt aluminum cans and pour them into sardine tins to make the blocks and then grind out the cavities to cast jigs!