thumb hole stock for Anschutz 18 MS silhouette rifle, like old style fagion type.

What about it?

Those can be pretty hard to come by these days. I did a quick search for Fajen on a couple sites and didn't see anything for the Anschutz platform. I'd reach out to Hoosier Gun Works as they often have things in stock that aren't on their website. Nice people too.

http://www.hoosiergunworks.com/contact_us.html

If you are looking for a thumb hole for the MS18, it was made by McMillan.