Hello Buick Kid.
I see that there has not been a reply to your interior questions; so I will refer you to www.autoupholsterykits.com who make upholstery for any car, either stock or custom. They can provide you with headliner, windlace, sunvisors, door panles, seat upholstery, carpet and dash restoration. They also have great prices on all their products, including convertible tops. Have a look and let me know what you think.
Best Regards,
Ron