Classic/Antique Car Repair: 1959 Buick Invicta (convertible), hemmings motor news, headlight bulbs

Question
As something of a neophyte to classic car repairs, I need to replace the four headlight bulbs (sealed beam) in my car.  Can you point/refer me to anyone who supplies them?  Thanks for any help you can be.

Answer
My stock answer for “where can I find….” Is to latch on to a copy of Hemmings Motor News, the old car hobbies classified bible. There are many companies that supply parts for old cars and you will find them in Hemmings. www.hemmings.com
Brad
NAPA can also supply those bulbs.