Can't seem to get a link for you. Go here:
https://sdp-si.com/eStore/ and select "metric unit" at the top, right below the part search box. Below that there is a list of items, click on "gears", then "spur gears", then "metal". The list on the right will open with all of the gears, select mod "1", then go over to bore size and select "6mm", then go back to hub style and selct 'with hub and setscrew". Pretty easy site to navigate once you make sure and check "inch" or "metric" before you try to search.