Water pump leak: gasket options?

My gut tells me the little paper gasket is not doing its job. I have made my own gaskets out of gasketmaker in the past, but what is your preferred method? Gaskaseal?  Trace and use a better gasket? I scraped all of the old gasket off and have very clean surfaces on both sides.  https://drive.google.com/file/d/1qPz8NSo3ldpsIruP2JRoRjScz4but56E/view?usp=sharing

Last year I just dealt with the leak (it was smaller last year), and as you can see, it is right at the paper gasket. But really, the o-ring seemed like it was the right overall diameter (2" ish), but tiny and not very thick (*but was identical to the o-ring I pulled out)

This is what I replaced https://www.nautiqueparts.com/product/impeller-pcm-gm-for-non-serpentine-belt-engines-rp061017/ and impellers were the exact same size (same purchase as last year). 

Thoughts?  Thanks in advance! 

This is a 1994 SN w/ Ford engine. I have no overheating issues, just doing routine maintenance :)

As far as I can remember all mine (85, 95, 2000) just has a brass backing plate and the O-ring and they never leaked 🤔

Click on the link for a Sherwood Catalog, go to page 32 

It only needed the O ring and no paper gasket.

The paper gasket showed up with the bigger wear plate that wasn't set into a recess.

Here's a picture of the G20 plate recessed into the bearing housing on a pump from 1976

And a picture of couple of the later style next to the old style