brass washers for manifold

I need to know if anyone knows where to get the brass washers for the ends of the manifolds. I had a shop here in town help with some broken stud on my /6 and they didn't put the brass washers on the ends so now they leak a little antifreeze. I can't seem to find anyone with the brass washers. Does anyone know if I can still get them? Maybe even and alternative?

here is a pic, the white residue can't be good. thanks for any help

Author: admin