I just did a search on the parts store i have been using for the past 20 years. Searched for various parts for 1968 firebird. They don't have any power steering parts in stock. Nothing. No gasket sets. only valve cover gaskets and intake manifold gaskets. That's it.
Most everything now has to come out of a warehouse in Phoenix which can take a day or 2.
Here we go

Did either of these templates ever surface?

X2 for VR1. Usually Walmart is cheapest, sometimes Menards.
RockAuto has Wix filters about as cheap as anyone.