So I ended up finding a regular bulb. Where I am at, Menards and Lowe's did not have the round contacts, but my local Ace Hardware did. So I picked one up. I have a few questions though I hope you guys can clear up:
1) So in regards to the contacts on the bulb, does it matter whether it's the oval contacts or the circular ones, even though the socket has the circle contacts? The reason I ask is that I went through all of this with a 1950's Convertible I once owned. I had a good bulb, and it acted like it wouldn't fit. Was I doing something wrong, or is my late 1970's metal base Convertible slightly different?
2) To Les or rivstg1, could one of you please post a different link, or just an item number? The link that was posted just takes me to the eBay main page for some reason. I think I found it, but I just want to be sure.
I want to personally thank everyone for their replies. They have been most helpful.
-Alex