Here ya go.. as you stated, they go between the knuckle and the caliper mounting bracket. If you look real close in this picture you can see the edge of them:



If you were like me.. now you are wondering where you can find the "illustrious" spacers. From another post running in parallel to this:

Originally posted by SVTforme:

FYI..

I ended up getting mine at McMaster Carr. They are hardened steel Belleville washers, part number 96445K267. They are 1.5mm in thickness each, so you need 8 of them total, which you can get in one package. If you opt for stainless (96475K267), you will need 2 packages. They fit perfectly for me. These aren't some cheap low carbon steel K-Mart blue light specials, they are Grade 6150 Chrome Vanadium Steel. The alternative is 17-7 PH Stainless Steel

Belleville washers are "spring washers", which maintain tension when force is applied to their surfaces and can be used to prevent bolt loosening.