Al, do you still have that chart of all of the different Fuchs offered?
That'll give him an idea of what widths, dish and backset used to be offered.
And I totally agree on the bump up to 16" wheels, or even 17" wheels on a wide body Speedster. They fit (depending on tires used) and look awesome.
I will say that, were I to build my car starting today with the current astronomical prices for original forged Fuchs, I would go with a Chevy pattern and find a wheel I like and go with it. There are tons of Chevy-pattern wheels available (adapters, too), whereas only a handful of popular cars use the 5 X 130 Porsche pattern (the popular ones being German and mostly Porsche).
Here's a good site to start with, just search instead for Chevy wheels (scroll down a little and enter different search parameters):
https://www.roadkillcustoms.co...130mm-5x5.12-inches/
And following their link for "5 X 130 Wheels" gets you to Amazon: