Side mirror pivot mechanism

I had a bit of a mishap on the road and my right side mirror took the brunt of it. The round plastic puck looking piece that holds the mirror onto the four prongs of the mechanical pivot cracked. I took it to a dealer and they said I'd need to replace the whole housing and everything, but part of me thinks they were just trying to make it easier on them and charge a little extra.

Well now I'm looking up the part on the Toyota website (diagram attached at bottom) and it says "N04 This part is not available for service" in the bottom left. Anybody know of a way I can re-attach this mirror without buying the whole new housing? This mirror has the side view camera underneath and can be quite expensive so I'd prefer to avoid purchasing a new one entirely.

 

Any of these trucks showing up in the junk yard yet? Possibly take apart a mirror on a wrecked truck??

 

Newer vehicles are rare in junk yards. They get bought up pretty quick. From experience, if you own a Jeep Wrangler, you will almost never find one no matter the age.