I bought from Anarchy Stencils in the UK. (They ship to US). Slightly pricey - but they are mylar - which means you can clean them and they last a LONG time - compared to some of the paper stencils out there. They have alot of patterns.
J.
https://www.anarchymodels.co.uk/
I bought the HS-16 and HS - 45.... those two cover alot of options.