Try Coker Tire 800-251-6336
www.cokertire.com
They sell excellent reproduction wheels, tires and accessories for
antique cars. The original manufacturer of Cadillac wire wheels was
Kelsey Hayes. I believe the reproductions are made by them as well.
Since you're new to the hobby, you would do well to make use of the
Cadillac LaSalle Club website and forum. You will get lots of valuable
year-and-model-specific Cadillac information.
www.cadillaclasalleclub.org/forum/index.php
www.cadillaclasalleclub.org/
I have a 1956 Coupe De Ville and I can't believe that I went as long
as I did without using this site.It has helped me immensely.
Forrest