Most of those yahoo groups moved to GROUPS.IO. You might try looking there for the group that interests you. I did not see the group I.D., but most groups kept the same name.

bkay

Welcome to Quilting Board, 70suslise. While some of the Yahoo Groups went to io.groups, some went to facebook. The one Cari recommended is https://www.facebook.com/groups/821555271188096/ There is another at https://www.facebook.com/groups/659877447448317/ and then the io groups is https://groups.io/g/vintagesewingmachinerepair
When Yahoo Groups got discontinued (about 6 years ago), I didn't go over to any of them.