Source of good replacement auto-dimming outside mirror?

[lunytnz]

Where might I find a good quality replacement auto-dimming outside mirror for my 99?

 

About 5 years ago, the auto-dimming fluid leaked out of the passenger side mirror and I found a used one at a wrecking yard and replaced just the 'mirror' part of it and it worked out well.

 

But, now the driver side mirror has failed (leaked and now I see double when looking at the mirror) and since the truck is 20 years old, I figure it's just a matter of time before a used one will fail.  I'm hoping to find a new replacement part that is both heated AND auto-dimming.

 

I haven't had much success searching online, so hoping someone has found a good source for a quality replacement part.  Ideally, JUST the mirror surface (not the entire mirror assembly, with housing/body part).

 

Thanks for your help!