I'm working on an '82 Impala and I had to remove the small metal tubes going to the exhaust manifolds due to rust. I believe this was part of the smog pump system which has been removed. Does anybody know where to get plugs to seal the holes? There was a tube with what looks like a double flare tube nut for each cylinder so I need 8 of these.

I tried NAPA and they didn't have them. I can't seem to find them at Summit Racing either.