To your original question, I replaced the OE passenger side glass in my 70RR convertible with Auto City pieces as no one else makes convertible side glass. Both the quarter and door glass were perfect matches to the OE glass, minus the 50yrs of scratches and blemishes. These pieces were made in Taiwan. Prices were very reasonable.
I've also had good experiences wit them and several different makes.
One thing to be aware of is all reproduction glass will have small barely noticeable dimples at the edges that is caused during the manufacturing process (or so I've been told and experienced)