My outside casing for the driver side door mirror is broken. I would really appreciate some help. The mirror works OK, just the casing seems to be broken

I read a thread here which seems like what I want to do

https://acurazine.com/forums/3g-tl-2...-parts-990474/

The part I _think_ is the same as the one I need?

https://www.oemacuraparts.com/oem-pa...-76201sepa11zj

He says the door panel doesnt need to be opened. I am not sure how to tag him on this thread...

Pics of my broken driver side mirror

 

^
From the looks of those pictures, you are going to need one, color coded to your car, of either #4 or 9 housing set and one of #1 or 2 side turn lamp unit.
Mirror - 2008 Acura TL 4 Door TYPE-S KA 5AT (acurapartswarehouse.com)

The diagrams below will give some detail on how to dismantle the mirror.