I know AMD sells them for B and E bodies but not for As.
Like I said, you will have to find one somewhere. They're on Ebay sometimes. Get one from out west. Shipping will be killer but what can you do, it's either that or scrap the car. Post a want ad here, maybe you'll get lucky and find someone close to you.
Auto Rust Technicians have their cap things which slide over rusted out parts but those would not solve the problem of your f*cked up anchor. Perhaps maybe it could used as a template to locate the socket correctly but if it were me, I'd still want to replace the thing entirely. That way there is no guessing as to proper angularity and correct geometry as long as it's positioned exactly the same as the original.
