There's a poor quality image in the Gallery section of Classic Alfa's website. I have only seen pre-65 cars with the cloth insert; most were all-vinyl.
So buy the covers and have them taken apart to sew in a cloth panel, or go to a good trimmer with the necessary fine needles and have them made bespoke from the correct vinyl. You might also contact Elvezio (the BB's new site sponsor) to see what they can do for you. The best information is from Italian sources.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
Alfa Romeo Forums
A forum community dedicated to Alfa Romeo owners and enthusiasts. Come join the discussion about performance, parts, modifications, troubleshooting, maintenance, and more!