I sourced these from a fleabay seller named "thefastgear", & I must say they are better than I expected...they are intended for a 97 - 00 Yamaha XVS 650 & they fit the BA/SM forks pretty well. I reused the OEM O rings.
Here they are installed:

Pre-installation:



If you need to shim a spacer, something like this is what you want to use:

The PCV spacers needed to be shortened, & I may do some more work on the spacers before I am finished tuning this combo.