Thanks guys. The page "66fyssh" quotes is still alive, so I'm assuming they still have the service. My car was built in the US, but it and I are now in Canada. I hope that doesn't change things.
They should still send it to you. You'll need to print the form, fill it out and send it in. I was impressed by what they sent: 1). A nice letter saying they apologize for not having more information. 2). a photocopy of the IBM punch card, and 3). the break down of VIN and options. Not bad for $45 for a 50 year old car!
