Several years ago reproduction arm rest pads were available. They were made by SuperCar.com and sold by places such as CARS Inc. However they are currently unavailable, so I contacted the manufacturer.
Here is an email excerpt from Supercar.com
Hi Dan,
Thanks for taking the time to email me about my '64-'67 Buick Skylark/GS arm rest pads. Sorry this took a few days, I've been gone for the Labor Day weekend.
The bad news is there are currently no more of them left. I stopped making them in 2001 because they weren't profitible for me due to low sales (they are used on few models), and the fact that they are expensive and hard to make (require 3 times the usual materials plus custom stamped metal inserts, among other things).
The good news is I've begun the process of reproducing them again. This unfortunately requires me to make a substantial new investment, because I can't use my original mold and have no more metal inserts. We are currently working on the new mold, and are having new metals stamped. I'm not sure how long all that will take, but as soon as we're finished and I can confirm quality and fit, I'll start selling them again. They'll be Made in the USA as before, but the quality should be even better due to the new mold and the fact that I'm using NOS quality original pads to make the mold with. As a result, they'll have to sell for more than before, will be an excellent product for Buick enthusiasts. I'll be glad to let you know when they're ready, and will want to inform the Buick community in whatever ways will work best.
Thanks again,
Ron
SuperCar Specialty
Super Specialty Companies
supercar@supercar.com