Tapered Shims?

It is out of round this much the .010 bearings would not allow you to even turn the crankshaft after the journal cap has been tightened. If it is .013 undersize it is possible that the crank has been turned to .010. It this is the case and the cranshaft journals are still round the .010 bearings will work without shims.

I would not recommend shimming a bearing unless you are a very old experianced mechanic who knows how to live with his mistakes.

I've been told the shims you asked about are still available, but I agree with the advice given by Mark, Randy, & Claus. Those shims change the amount of squeeze or "crush" the rod or main bore has on the bearing. The size, roundness, straightness, and overall condition of rod and main bearing housing bores are often overlooked during a rebuild. Rebuilds that don't last can often be traced to this oversight. The difference between too much and too little crush is a matter of only a few 1,000th's of an inch. For good service life the bearing crush dimension must be correct, and at the same time, the bearing clearance must also be correct. Two important dimensions that are related, but separate. Good luck...Al English