Audiophile Grade RCA Input Suggestions?

Cardas does not make a two-way RCA component with 3 leads. Theirs are doubled up, as each signal path and ground connection has its own lead (a better design than what I’m looking for, but won’t fit into the printed circuit board I’m working on.)

Parts Express was also a no-go. 
Also, if anyone missed it, see my link above for an example of the specific form factor I need. 

If you're looking for a 2-RCA jack component with 3 leads onto the circuit board, you are not going to be able to get anything good.  Best bet is to search through digikey's offerings:

https://www.digikey.com/en/products/filter/barrel-audio-connectors/434?s=N4IgjCBcoEwBxVAYygMwIYBsDOB...

If you're willing to solder chassis wire between the RCA and the board, the Cardas are excellent value.  They are the "poor man's Furutech Rhodium" components.  If you want the best, get Furutech Rhodium.  They have an extra heavy plating of rhodium on their stuff.

I put the link to inspire you to get the OEM part.
It's likely a custom run.

I agree that I think you're stuck with stock if you're not willing to build your own solution with more standard connectors. I've liked the WBT low mass RCAs I bought while switching everything I could over to pure silver, but haven't found the influence to be huge. Based on my modding experience, I'd spend on good film & foil caps, a power cord, or solid core silver internal wiring before upgrading RCAs. 

How can you tell if it is just the RCA connectors that seems to be shorted and not actually in the electronics passed the connector itself?