Cylinder Head bolts and washers

I am currently exploring options for newer washers and would like to learn about aftermarket alternatives or superior washers that might be more affordable than those available at the dealership. 

It is a 10mm on the shaft or bottom of bolt head

11mm on the threads

Washer reads 11.45mm

Here are some head bolts from a Big Block 454. Sizes are very similar, so I am going to try to use washer for them. 

11.14MM on the bolt shaft or bottom of bolt head

11.20MM