Have you tried looking at Graphics Fairy? She has lots of free vintage images, and even more if you want to pay for the premium version:
https://thegraphicsfairy.com/?s=sewing
just type a subject or theme or key word into the search box for lots of free images
https://thegraphicsfairy.com/search/
here is a pretty white sewing machine:
https://thegraphicsfairy.com/antique...ewing-machine/