Hi Celia, there are a couple of button presses out there Osborne tools make a good lever press machine but I find this a little hard work. The one I have used in the workshop is an Ornstin button machine and cutting press. This is an old discontinued English make but still come up on ebay and gumtree for sale. Usually an upholsterer is retiring and selling their tools and equipment. I will find some pictures to post here for people to see. Kind regards. Steve 

Hello there, you will find a video tutorial about it there: https://thegirlwithahammer.com/upholstery-tutorial-and-tips/how-to-create-bespoke-buttons/