From time to time I've seen inquiries on this forum about where steel tapered shims for correcting universal joint angles or re-setting front axle caster can be obtained. I recently had some made up by R.C. Brown at a very reasonable cost. I received them in 3 days from the time my order was placed over the internet. His web site is http://4crawler.cruiserpages.com/4x4/ForSale/Shims.shtml