Has anyone noticed in recent times that the number of choices for 13" tires for the classic Fiats has dwindled down to near nothing? Most of the available choices are low end tires for small economy cars. the one Michelin, which no one has in stock was introduced in the 1970's and runs $350/tire.

What is everyone out there doing for decent performance tires these days on the older Fiats? Moving up to larger diameter aftermarket wheels in order to get a decent performance tire?