...and unfortunately proper missals are more difficult to find nowadays.
Really? I have my Angelus Press one that I bought at the Shrine and I see a lot of them floating around at Old St Mary's in DC and at St. Alphonsus in Baltimore (the two places I go when I go to a usus antiquior Mass).
Usually the Shrine's bookstore is well stocked with them. But maybe the EF is gaining enough in popularity where they are being sold out most places.